Home / 9,115.42-13,649.47-7,807.59

Finding the Fourth Proportional to 9,115.42, 13,649.47 and 7,807.59

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Solution

The fourth proportional to 9,115.42, 13,649.47 and 7,807.59 is: 11,691.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,115.42 : 13,649.47 = 7,807.59 : x
  2. Step 2: Convert to fraction form
    9,115.42/13,649.47 = 7,807.59/x
  3. Step 3: Cross multiply
    9,115.42x = 13,649.47 × 7,807.59
  4. Step 4: Simplify right side
    9,115.42x = 106,569,465.48
  5. Step 5: Solve for x
    x = 106,569,465.48/9,115.42
  6. Step 6: Final answer
    x = 11,691.12

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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.