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Finding the Fourth Proportional to 15,695.68, 21,634.02 and 15,280.16

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Solution

The fourth proportional to 15,695.68, 21,634.02 and 15,280.16 is: 21,061.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,695.68 : 21,634.02 = 15,280.16 : x
  2. Step 2: Convert to fraction form
    15,695.68/21,634.02 = 15,280.16/x
  3. Step 3: Cross multiply
    15,695.68x = 21,634.02 × 15,280.16
  4. Step 4: Simplify right side
    15,695.68x = 330,571,287.04
  5. Step 5: Solve for x
    x = 330,571,287.04/15,695.68
  6. Step 6: Final answer
    x = 21,061.29

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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.