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Finding the Fourth Proportional to 9,947.70, 14,928.45 and 7,487.70

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Solution

The fourth proportional to 9,947.70, 14,928.45 and 7,487.70 is: 11,236.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,947.70 : 14,928.45 = 7,487.70 : x
  2. Step 2: Convert to fraction form
    9,947.70/14,928.45 = 7,487.70/x
  3. Step 3: Cross multiply
    9,947.70x = 14,928.45 × 7,487.70
  4. Step 4: Simplify right side
    9,947.70x = 111,779,755.07
  5. Step 5: Solve for x
    x = 111,779,755.07/9,947.70
  6. Step 6: Final answer
    x = 11,236.74

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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.