Home / 30,156.40-45,234.72-12,613.92

Finding the Fourth Proportional to 30,156.40, 45,234.72 and 12,613.92

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Solution

The fourth proportional to 30,156.40, 45,234.72 and 12,613.92 is: 18,920.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,156.40 : 45,234.72 = 12,613.92 : x
  2. Step 2: Convert to fraction form
    30,156.40/45,234.72 = 12,613.92/x
  3. Step 3: Cross multiply
    30,156.40x = 45,234.72 × 12,613.92
  4. Step 4: Simplify right side
    30,156.40x = 570,587,139.30
  5. Step 5: Solve for x
    x = 570,587,139.30/30,156.40
  6. Step 6: Final answer
    x = 18,920.93

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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.