Home / 15,270.28-21,071.74-8,555.36

Finding the Fourth Proportional to 15,270.28, 21,071.74 and 8,555.36

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Solution

The fourth proportional to 15,270.28, 21,071.74 and 8,555.36 is: 11,805.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,270.28 : 21,071.74 = 8,555.36 : x
  2. Step 2: Convert to fraction form
    15,270.28/21,071.74 = 8,555.36/x
  3. Step 3: Cross multiply
    15,270.28x = 21,071.74 × 8,555.36
  4. Step 4: Simplify right side
    15,270.28x = 180,276,321.53
  5. Step 5: Solve for x
    x = 180,276,321.53/15,270.28
  6. Step 6: Final answer
    x = 11,805.70

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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.