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Finding the Fourth Proportional to 20,522.40, 30,782.32 and 7,374.40

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Solution

The fourth proportional to 20,522.40, 30,782.32 and 7,374.40 is: 11,061.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,522.40 : 30,782.32 = 7,374.40 : x
  2. Step 2: Convert to fraction form
    20,522.40/30,782.32 = 7,374.40/x
  3. Step 3: Cross multiply
    20,522.40x = 30,782.32 × 7,374.40
  4. Step 4: Simplify right side
    20,522.40x = 227,001,140.61
  5. Step 5: Solve for x
    x = 227,001,140.61/20,522.40
  6. Step 6: Final answer
    x = 11,061.14

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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.