Home / 12,931.68-19,407.18-8,761.80

Finding the Fourth Proportional to 12,931.68, 19,407.18 and 8,761.80

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Solution

The fourth proportional to 12,931.68, 19,407.18 and 8,761.80 is: 13,149.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,931.68 : 19,407.18 = 8,761.80 : x
  2. Step 2: Convert to fraction form
    12,931.68/19,407.18 = 8,761.80/x
  3. Step 3: Cross multiply
    12,931.68x = 19,407.18 × 8,761.80
  4. Step 4: Simplify right side
    12,931.68x = 170,041,829.72
  5. Step 5: Solve for x
    x = 170,041,829.72/12,931.68
  6. Step 6: Final answer
    x = 13,149.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.