Home / 22,561.60-31,135.20-12,489.76

Finding the Fourth Proportional to 22,561.60, 31,135.20 and 12,489.76

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Solution

The fourth proportional to 22,561.60, 31,135.20 and 12,489.76 is: 17,235.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,561.60 : 31,135.20 = 12,489.76 : x
  2. Step 2: Convert to fraction form
    22,561.60/31,135.20 = 12,489.76/x
  3. Step 3: Cross multiply
    22,561.60x = 31,135.20 × 12,489.76
  4. Step 4: Simplify right side
    22,561.60x = 388,871,175.55
  5. Step 5: Solve for x
    x = 388,871,175.55/22,561.60
  6. Step 6: Final answer
    x = 17,235.98

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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.