Home / 20,637.86-28,480.55-11,685.11

Finding the Fourth Proportional to 20,637.86, 28,480.55 and 11,685.11

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Solution

The fourth proportional to 20,637.86, 28,480.55 and 11,685.11 is: 16,125.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.86 : 28,480.55 = 11,685.11 : x
  2. Step 2: Convert to fraction form
    20,637.86/28,480.55 = 11,685.11/x
  3. Step 3: Cross multiply
    20,637.86x = 28,480.55 × 11,685.11
  4. Step 4: Simplify right side
    20,637.86x = 332,798,158.78
  5. Step 5: Solve for x
    x = 332,798,158.78/20,637.86
  6. Step 6: Final answer
    x = 16,125.62

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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.