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Finding the Fourth Proportional to 8,681.34, 11,979.72 and 5,324.16

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Solution

The fourth proportional to 8,681.34, 11,979.72 and 5,324.16 is: 7,347.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,681.34 : 11,979.72 = 5,324.16 : x
  2. Step 2: Convert to fraction form
    8,681.34/11,979.72 = 5,324.16/x
  3. Step 3: Cross multiply
    8,681.34x = 11,979.72 × 5,324.16
  4. Step 4: Simplify right side
    8,681.34x = 63,781,946.04
  5. Step 5: Solve for x
    x = 63,781,946.04/8,681.34
  6. Step 6: Final answer
    x = 7,347.02

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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.