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Finding the Fourth Proportional to 20,258.60, 30,387.90 and 20,064.20

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Solution

The fourth proportional to 20,258.60, 30,387.90 and 20,064.20 is: 30,096.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,258.60 : 30,387.90 = 20,064.20 : x
  2. Step 2: Convert to fraction form
    20,258.60/30,387.90 = 20,064.20/x
  3. Step 3: Cross multiply
    20,258.60x = 30,387.90 × 20,064.20
  4. Step 4: Simplify right side
    20,258.60x = 609,708,903.18
  5. Step 5: Solve for x
    x = 609,708,903.18/20,258.60
  6. Step 6: Final answer
    x = 30,096.30

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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.