Home / 8,121.41-11,205.61-5,602.72

Finding the Fourth Proportional to 8,121.41, 11,205.61 and 5,602.72

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Solution

The fourth proportional to 8,121.41, 11,205.61 and 5,602.72 is: 7,730.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.41 : 11,205.61 = 5,602.72 : x
  2. Step 2: Convert to fraction form
    8,121.41/11,205.61 = 5,602.72/x
  3. Step 3: Cross multiply
    8,121.41x = 11,205.61 × 5,602.72
  4. Step 4: Simplify right side
    8,121.41x = 62,781,895.26
  5. Step 5: Solve for x
    x = 62,781,895.26/8,121.41
  6. Step 6: Final answer
    x = 7,730.42

Related Problems

Find fourth proportional to 4,060.71, 5,602.81 and 2,801.36
Half scale
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Double scale
Find fourth proportional to 8,122.41, 11,206.99 and 5,603.72
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.