Home / 20,637.79-28,479.60-11,686.14

Finding the Fourth Proportional to 20,637.79, 28,479.60 and 11,686.14

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Solution

The fourth proportional to 20,637.79, 28,479.60 and 11,686.14 is: 16,126.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.79 : 28,479.60 = 11,686.14 : x
  2. Step 2: Convert to fraction form
    20,637.79/28,479.60 = 11,686.14/x
  3. Step 3: Cross multiply
    20,637.79x = 28,479.60 × 11,686.14
  4. Step 4: Simplify right side
    20,637.79x = 332,816,592.74
  5. Step 5: Solve for x
    x = 332,816,592.74/20,637.79
  6. Step 6: Final answer
    x = 16,126.56

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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.