Home / 12,139.56-18,207.90-4,240.80

Finding the Fourth Proportional to 12,139.56, 18,207.90 and 4,240.80

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Solution

The fourth proportional to 12,139.56, 18,207.90 and 4,240.80 is: 6,360.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.56 : 18,207.90 = 4,240.80 : x
  2. Step 2: Convert to fraction form
    12,139.56/18,207.90 = 4,240.80/x
  3. Step 3: Cross multiply
    12,139.56x = 18,207.90 × 4,240.80
  4. Step 4: Simplify right side
    12,139.56x = 77,216,062.32
  5. Step 5: Solve for x
    x = 77,216,062.32/12,139.56
  6. Step 6: Final answer
    x = 6,360.70

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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.