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Finding the Fourth Proportional to 21,765.55, 32,649.10 and 6,972.55

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Solution

The fourth proportional to 21,765.55, 32,649.10 and 6,972.55 is: 10,459.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,765.55 : 32,649.10 = 6,972.55 : x
  2. Step 2: Convert to fraction form
    21,765.55/32,649.10 = 6,972.55/x
  3. Step 3: Cross multiply
    21,765.55x = 32,649.10 × 6,972.55
  4. Step 4: Simplify right side
    21,765.55x = 227,647,482.21
  5. Step 5: Solve for x
    x = 227,647,482.21/21,765.55
  6. Step 6: Final answer
    x = 10,459.07

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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.