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Finding the Fourth Proportional to 30,863.68, 42,591.68 and 17,439.28

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Solution

The fourth proportional to 30,863.68, 42,591.68 and 17,439.28 is: 24,066.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,863.68 : 42,591.68 = 17,439.28 : x
  2. Step 2: Convert to fraction form
    30,863.68/42,591.68 = 17,439.28/x
  3. Step 3: Cross multiply
    30,863.68x = 42,591.68 × 17,439.28
  4. Step 4: Simplify right side
    30,863.68x = 742,768,233.19
  5. Step 5: Solve for x
    x = 742,768,233.19/30,863.68
  6. Step 6: Final answer
    x = 24,066.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.