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Finding the Fourth Proportional to 30,356.60, 45,534.90 and 20,442.20

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Solution

The fourth proportional to 30,356.60, 45,534.90 and 20,442.20 is: 30,663.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,356.60 : 45,534.90 = 20,442.20 : x
  2. Step 2: Convert to fraction form
    30,356.60/45,534.90 = 20,442.20/x
  3. Step 3: Cross multiply
    30,356.60x = 45,534.90 × 20,442.20
  4. Step 4: Simplify right side
    30,356.60x = 930,833,532.78
  5. Step 5: Solve for x
    x = 930,833,532.78/30,356.60
  6. Step 6: Final answer
    x = 30,663.30

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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.