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Finding the Fourth Proportional to 11,320.70, 15,631.88 and 7,348.59

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Solution

The fourth proportional to 11,320.70, 15,631.88 and 7,348.59 is: 10,147.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,320.70 : 15,631.88 = 7,348.59 : x
  2. Step 2: Convert to fraction form
    11,320.70/15,631.88 = 7,348.59/x
  3. Step 3: Cross multiply
    11,320.70x = 15,631.88 × 7,348.59
  4. Step 4: Simplify right side
    11,320.70x = 114,872,240.31
  5. Step 5: Solve for x
    x = 114,872,240.31/11,320.70
  6. Step 6: Final answer
    x = 10,147.10

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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.