Home / 12,712.20-19,062.90-6,140.40

Finding the Fourth Proportional to 12,712.20, 19,062.90 and 6,140.40

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Solution

The fourth proportional to 12,712.20, 19,062.90 and 6,140.40 is: 9,207.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,712.20 : 19,062.90 = 6,140.40 : x
  2. Step 2: Convert to fraction form
    12,712.20/19,062.90 = 6,140.40/x
  3. Step 3: Cross multiply
    12,712.20x = 19,062.90 × 6,140.40
  4. Step 4: Simplify right side
    12,712.20x = 117,053,831.16
  5. Step 5: Solve for x
    x = 117,053,831.16/12,712.20
  6. Step 6: Final answer
    x = 9,207.99

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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.