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Finding the Fourth Proportional to 21,166.72, 31,750.08 and 7,308.16

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Solution

The fourth proportional to 21,166.72, 31,750.08 and 7,308.16 is: 10,962.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,166.72 : 31,750.08 = 7,308.16 : x
  2. Step 2: Convert to fraction form
    21,166.72/31,750.08 = 7,308.16/x
  3. Step 3: Cross multiply
    21,166.72x = 31,750.08 × 7,308.16
  4. Step 4: Simplify right side
    21,166.72x = 232,034,664.65
  5. Step 5: Solve for x
    x = 232,034,664.65/21,166.72
  6. Step 6: Final answer
    x = 10,962.24

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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.