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Finding the Fourth Proportional to 28,567.62, 42,867.62 and 15,419.70

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Solution

The fourth proportional to 28,567.62, 42,867.62 and 15,419.70 is: 23,138.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,567.62 : 42,867.62 = 15,419.70 : x
  2. Step 2: Convert to fraction form
    28,567.62/42,867.62 = 15,419.70/x
  3. Step 3: Cross multiply
    28,567.62x = 42,867.62 × 15,419.70
  4. Step 4: Simplify right side
    28,567.62x = 661,005,840.11
  5. Step 5: Solve for x
    x = 661,005,840.11/28,567.62
  6. Step 6: Final answer
    x = 23,138.29

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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.