Home / 11,121.52-15,347.84-6,405.80

Finding the Fourth Proportional to 11,121.52, 15,347.84 and 6,405.80

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Solution

The fourth proportional to 11,121.52, 15,347.84 and 6,405.80 is: 8,840.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.52 : 15,347.84 = 6,405.80 : x
  2. Step 2: Convert to fraction form
    11,121.52/15,347.84 = 6,405.80/x
  3. Step 3: Cross multiply
    11,121.52x = 15,347.84 × 6,405.80
  4. Step 4: Simplify right side
    11,121.52x = 98,315,248.45
  5. Step 5: Solve for x
    x = 98,315,248.45/11,121.52
  6. Step 6: Final answer
    x = 8,840.09

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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.