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Finding the Fourth Proportional to 9,876.31, 14,820.31 and 3,640.70

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Solution

The fourth proportional to 9,876.31, 14,820.31 and 3,640.70 is: 5,463.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,876.31 : 14,820.31 = 3,640.70 : x
  2. Step 2: Convert to fraction form
    9,876.31/14,820.31 = 3,640.70/x
  3. Step 3: Cross multiply
    9,876.31x = 14,820.31 × 3,640.70
  4. Step 4: Simplify right side
    9,876.31x = 53,956,302.62
  5. Step 5: Solve for x
    x = 53,956,302.62/9,876.31
  6. Step 6: Final answer
    x = 5,463.20

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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.