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Finding the Fourth Proportional to 9,012.39, 12,437.02 and 4,979.21

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Solution

The fourth proportional to 9,012.39, 12,437.02 and 4,979.21 is: 6,871.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,012.39 : 12,437.02 = 4,979.21 : x
  2. Step 2: Convert to fraction form
    9,012.39/12,437.02 = 4,979.21/x
  3. Step 3: Cross multiply
    9,012.39x = 12,437.02 × 4,979.21
  4. Step 4: Simplify right side
    9,012.39x = 61,926,553.00
  5. Step 5: Solve for x
    x = 61,926,553.00/9,012.39
  6. Step 6: Final answer
    x = 6,871.27

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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.