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Finding the Fourth Proportional to 9,979.21, 15,001.62 and 9,257.50

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Solution

The fourth proportional to 9,979.21, 15,001.62 and 9,257.50 is: 13,916.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,979.21 : 15,001.62 = 9,257.50 : x
  2. Step 2: Convert to fraction form
    9,979.21/15,001.62 = 9,257.50/x
  3. Step 3: Cross multiply
    9,979.21x = 15,001.62 × 9,257.50
  4. Step 4: Simplify right side
    9,979.21x = 138,877,497.15
  5. Step 5: Solve for x
    x = 138,877,497.15/9,979.21
  6. Step 6: Final answer
    x = 13,916.68

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Double scale
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1.5x scale

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.