Home / 12,711.20-19,061.40-6,139.40

Finding the Fourth Proportional to 12,711.20, 19,061.40 and 6,139.40

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Solution

The fourth proportional to 12,711.20, 19,061.40 and 6,139.40 is: 9,206.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,711.20 : 19,061.40 = 6,139.40 : x
  2. Step 2: Convert to fraction form
    12,711.20/19,061.40 = 6,139.40/x
  3. Step 3: Cross multiply
    12,711.20x = 19,061.40 × 6,139.40
  4. Step 4: Simplify right side
    12,711.20x = 117,025,559.16
  5. Step 5: Solve for x
    x = 117,025,559.16/12,711.20
  6. Step 6: Final answer
    x = 9,206.49

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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.