Home / 12,931.71-19,397.66-5,140.55

Finding the Fourth Proportional to 12,931.71, 19,397.66 and 5,140.55

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Solution

The fourth proportional to 12,931.71, 19,397.66 and 5,140.55 is: 7,710.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,931.71 : 19,397.66 = 5,140.55 : x
  2. Step 2: Convert to fraction form
    12,931.71/19,397.66 = 5,140.55/x
  3. Step 3: Cross multiply
    12,931.71x = 19,397.66 × 5,140.55
  4. Step 4: Simplify right side
    12,931.71x = 99,714,518.42
  5. Step 5: Solve for x
    x = 99,714,518.42/12,931.71
  6. Step 6: Final answer
    x = 7,710.85

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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.