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Finding the Fourth Proportional to 30,102.80, 45,161.40 and 12,562.88

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Solution

The fourth proportional to 30,102.80, 45,161.40 and 12,562.88 is: 18,847.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,102.80 : 45,161.40 = 12,562.88 : x
  2. Step 2: Convert to fraction form
    30,102.80/45,161.40 = 12,562.88/x
  3. Step 3: Cross multiply
    30,102.80x = 45,161.40 × 12,562.88
  4. Step 4: Simplify right side
    30,102.80x = 567,357,248.83
  5. Step 5: Solve for x
    x = 567,357,248.83/30,102.80
  6. Step 6: Final answer
    x = 18,847.32

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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.