Home / 28,419.39-42,616.13-18,407.79

Finding the Fourth Proportional to 28,419.39, 42,616.13 and 18,407.79

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Solution

The fourth proportional to 28,419.39, 42,616.13 and 18,407.79 is: 27,603.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,419.39 : 42,616.13 = 18,407.79 : x
  2. Step 2: Convert to fraction form
    28,419.39/42,616.13 = 18,407.79/x
  3. Step 3: Cross multiply
    28,419.39x = 42,616.13 × 18,407.79
  4. Step 4: Simplify right side
    28,419.39x = 784,468,679.61
  5. Step 5: Solve for x
    x = 784,468,679.61/28,419.39
  6. Step 6: Final answer
    x = 27,603.29

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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.