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Finding the Fourth Proportional to 9,856.76, 13,602.08 and 5,380.64

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Solution

The fourth proportional to 9,856.76, 13,602.08 and 5,380.64 is: 7,425.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,856.76 : 13,602.08 = 5,380.64 : x
  2. Step 2: Convert to fraction form
    9,856.76/13,602.08 = 5,380.64/x
  3. Step 3: Cross multiply
    9,856.76x = 13,602.08 × 5,380.64
  4. Step 4: Simplify right side
    9,856.76x = 73,187,895.73
  5. Step 5: Solve for x
    x = 73,187,895.73/9,856.76
  6. Step 6: Final answer
    x = 7,425.15

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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.