Home / 28,607.80-39,475.12-15,860.86

Finding the Fourth Proportional to 28,607.80, 39,475.12 and 15,860.86

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Solution

The fourth proportional to 28,607.80, 39,475.12 and 15,860.86 is: 21,885.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,607.80 : 39,475.12 = 15,860.86 : x
  2. Step 2: Convert to fraction form
    28,607.80/39,475.12 = 15,860.86/x
  3. Step 3: Cross multiply
    28,607.80x = 39,475.12 × 15,860.86
  4. Step 4: Simplify right side
    28,607.80x = 626,109,351.80
  5. Step 5: Solve for x
    x = 626,109,351.80/28,607.80
  6. Step 6: Final answer
    x = 21,885.97

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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.