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Finding the Fourth Proportional to 20,442.60, 30,663.90 and 10,584.90

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Solution

The fourth proportional to 20,442.60, 30,663.90 and 10,584.90 is: 15,877.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,442.60 : 30,663.90 = 10,584.90 : x
  2. Step 2: Convert to fraction form
    20,442.60/30,663.90 = 10,584.90/x
  3. Step 3: Cross multiply
    20,442.60x = 30,663.90 × 10,584.90
  4. Step 4: Simplify right side
    20,442.60x = 324,574,315.11
  5. Step 5: Solve for x
    x = 324,574,315.11/20,442.60
  6. Step 6: Final answer
    x = 15,877.35

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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.