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Finding the Fourth Proportional to 7,887.40, 10,885.14 and 4,531.30

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Solution

The fourth proportional to 7,887.40, 10,885.14 and 4,531.30 is: 6,253.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,887.40 : 10,885.14 = 4,531.30 : x
  2. Step 2: Convert to fraction form
    7,887.40/10,885.14 = 4,531.30/x
  3. Step 3: Cross multiply
    7,887.40x = 10,885.14 × 4,531.30
  4. Step 4: Simplify right side
    7,887.40x = 49,323,834.88
  5. Step 5: Solve for x
    x = 49,323,834.88/7,887.40
  6. Step 6: Final answer
    x = 6,253.50

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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.