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Finding the Fourth Proportional to 21,991.44, 32,987.28 and 7,200.24

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Solution

The fourth proportional to 21,991.44, 32,987.28 and 7,200.24 is: 10,800.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,991.44 : 32,987.28 = 7,200.24 : x
  2. Step 2: Convert to fraction form
    21,991.44/32,987.28 = 7,200.24/x
  3. Step 3: Cross multiply
    21,991.44x = 32,987.28 × 7,200.24
  4. Step 4: Simplify right side
    21,991.44x = 237,516,332.95
  5. Step 5: Solve for x
    x = 237,516,332.95/21,991.44
  6. Step 6: Final answer
    x = 10,800.40

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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.