Home / 30,000.80-45,003.72-12,472.40

Finding the Fourth Proportional to 30,000.80, 45,003.72 and 12,472.40

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Solution

The fourth proportional to 30,000.80, 45,003.72 and 12,472.40 is: 18,709.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,000.80 : 45,003.72 = 12,472.40 : x
  2. Step 2: Convert to fraction form
    30,000.80/45,003.72 = 12,472.40/x
  3. Step 3: Cross multiply
    30,000.80x = 45,003.72 × 12,472.40
  4. Step 4: Simplify right side
    30,000.80x = 561,304,397.33
  5. Step 5: Solve for x
    x = 561,304,397.33/30,000.80
  6. Step 6: Final answer
    x = 18,709.65

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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.