Home / 15,125.39-20,874.88-9,156.90

Finding the Fourth Proportional to 15,125.39, 20,874.88 and 9,156.90

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Solution

The fourth proportional to 15,125.39, 20,874.88 and 9,156.90 is: 12,637.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,125.39 : 20,874.88 = 9,156.90 : x
  2. Step 2: Convert to fraction form
    15,125.39/20,874.88 = 9,156.90/x
  3. Step 3: Cross multiply
    15,125.39x = 20,874.88 × 9,156.90
  4. Step 4: Simplify right side
    15,125.39x = 191,149,188.67
  5. Step 5: Solve for x
    x = 191,149,188.67/15,125.39
  6. Step 6: Final answer
    x = 12,637.64

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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.