Home / 28,693.80-39,652.20-21,607.92

Finding the Fourth Proportional to 28,693.80, 39,652.20 and 21,607.92

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Solution

The fourth proportional to 28,693.80, 39,652.20 and 21,607.92 is: 29,860.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,693.80 : 39,652.20 = 21,607.92 : x
  2. Step 2: Convert to fraction form
    28,693.80/39,652.20 = 21,607.92/x
  3. Step 3: Cross multiply
    28,693.80x = 39,652.20 × 21,607.92
  4. Step 4: Simplify right side
    28,693.80x = 856,801,565.42
  5. Step 5: Solve for x
    x = 856,801,565.42/28,693.80
  6. Step 6: Final answer
    x = 29,860.16

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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.