Home / 11,439.12-17,158.64-7,515.14

Finding the Fourth Proportional to 11,439.12, 17,158.64 and 7,515.14

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Solution

The fourth proportional to 11,439.12, 17,158.64 and 7,515.14 is: 11,272.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,439.12 : 17,158.64 = 7,515.14 : x
  2. Step 2: Convert to fraction form
    11,439.12/17,158.64 = 7,515.14/x
  3. Step 3: Cross multiply
    11,439.12x = 17,158.64 × 7,515.14
  4. Step 4: Simplify right side
    11,439.12x = 128,949,581.81
  5. Step 5: Solve for x
    x = 128,949,581.81/11,439.12
  6. Step 6: Final answer
    x = 11,272.68

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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.