Home / 12,720.92-19,062.86-6,139.40

Finding the Fourth Proportional to 12,720.92, 19,062.86 and 6,139.40

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Solution

The fourth proportional to 12,720.92, 19,062.86 and 6,139.40 is: 9,200.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.92 : 19,062.86 = 6,139.40 : x
  2. Step 2: Convert to fraction form
    12,720.92/19,062.86 = 6,139.40/x
  3. Step 3: Cross multiply
    12,720.92x = 19,062.86 × 6,139.40
  4. Step 4: Simplify right side
    12,720.92x = 117,034,396.67
  5. Step 5: Solve for x
    x = 117,034,396.67/12,720.92
  6. Step 6: Final answer
    x = 9,200.16

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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.