Home / 15,711.71-21,716.51-13,809.02

Finding the Fourth Proportional to 15,711.71, 21,716.51 and 13,809.02

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Solution

The fourth proportional to 15,711.71, 21,716.51 and 13,809.02 is: 19,086.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,711.71 : 21,716.51 = 13,809.02 : x
  2. Step 2: Convert to fraction form
    15,711.71/21,716.51 = 13,809.02/x
  3. Step 3: Cross multiply
    15,711.71x = 21,716.51 × 13,809.02
  4. Step 4: Simplify right side
    15,711.71x = 299,883,543.29
  5. Step 5: Solve for x
    x = 299,883,543.29/15,711.71
  6. Step 6: Final answer
    x = 19,086.63

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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.