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Finding the Fourth Proportional to 21,987.30, 32,983.65 and 7,192.20

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Solution

The fourth proportional to 21,987.30, 32,983.65 and 7,192.20 is: 10,789.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,987.30 : 32,983.65 = 7,192.20 : x
  2. Step 2: Convert to fraction form
    21,987.30/32,983.65 = 7,192.20/x
  3. Step 3: Cross multiply
    21,987.30x = 32,983.65 × 7,192.20
  4. Step 4: Simplify right side
    21,987.30x = 237,225,007.53
  5. Step 5: Solve for x
    x = 237,225,007.53/21,987.30
  6. Step 6: Final answer
    x = 10,789.18

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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.