Home / 28,681.28-39,580.56-15,934.76

Finding the Fourth Proportional to 28,681.28, 39,580.56 and 15,934.76

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Solution

The fourth proportional to 28,681.28, 39,580.56 and 15,934.76 is: 21,990.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,681.28 : 39,580.56 = 15,934.76 : x
  2. Step 2: Convert to fraction form
    28,681.28/39,580.56 = 15,934.76/x
  3. Step 3: Cross multiply
    28,681.28x = 39,580.56 × 15,934.76
  4. Step 4: Simplify right side
    28,681.28x = 630,706,724.27
  5. Step 5: Solve for x
    x = 630,706,724.27/28,681.28
  6. Step 6: Final answer
    x = 21,990.19

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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.