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Finding the Fourth Proportional to 28,397.40, 42,601.22 and 9,676.40

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Solution

The fourth proportional to 28,397.40, 42,601.22 and 9,676.40 is: 14,516.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,397.40 : 42,601.22 = 9,676.40 : x
  2. Step 2: Convert to fraction form
    28,397.40/42,601.22 = 9,676.40/x
  3. Step 3: Cross multiply
    28,397.40x = 42,601.22 × 9,676.40
  4. Step 4: Simplify right side
    28,397.40x = 412,226,445.21
  5. Step 5: Solve for x
    x = 412,226,445.21/28,397.40
  6. Step 6: Final answer
    x = 14,516.34

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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.