Home / 20,718.59-28,591.65-11,287.13

Finding the Fourth Proportional to 20,718.59, 28,591.65 and 11,287.13

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Solution

The fourth proportional to 20,718.59, 28,591.65 and 11,287.13 is: 15,576.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.59 : 28,591.65 = 11,287.13 : x
  2. Step 2: Convert to fraction form
    20,718.59/28,591.65 = 11,287.13/x
  3. Step 3: Cross multiply
    20,718.59x = 28,591.65 × 11,287.13
  4. Step 4: Simplify right side
    20,718.59x = 322,717,527.51
  5. Step 5: Solve for x
    x = 322,717,527.51/20,718.59
  6. Step 6: Final answer
    x = 15,576.23

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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.