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Finding the Fourth Proportional to 9,913.78, 13,680.48 and 5,437.30

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Solution

The fourth proportional to 9,913.78, 13,680.48 and 5,437.30 is: 7,503.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,913.78 : 13,680.48 = 5,437.30 : x
  2. Step 2: Convert to fraction form
    9,913.78/13,680.48 = 5,437.30/x
  3. Step 3: Cross multiply
    9,913.78x = 13,680.48 × 5,437.30
  4. Step 4: Simplify right side
    9,913.78x = 74,384,873.90
  5. Step 5: Solve for x
    x = 74,384,873.90/9,913.78
  6. Step 6: Final answer
    x = 7,503.18

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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.