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Finding the Fourth Proportional to 21,995.52, 32,988.72 and 7,765.92

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Solution

The fourth proportional to 21,995.52, 32,988.72 and 7,765.92 is: 11,647.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,995.52 : 32,988.72 = 7,765.92 : x
  2. Step 2: Convert to fraction form
    21,995.52/32,988.72 = 7,765.92/x
  3. Step 3: Cross multiply
    21,995.52x = 32,988.72 × 7,765.92
  4. Step 4: Simplify right side
    21,995.52x = 256,187,760.42
  5. Step 5: Solve for x
    x = 256,187,760.42/21,995.52
  6. Step 6: Final answer
    x = 11,647.27

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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.