Home / 30,147.76-45,221.10-12,374.56

Finding the Fourth Proportional to 30,147.76, 45,221.10 and 12,374.56

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Solution

The fourth proportional to 30,147.76, 45,221.10 and 12,374.56 is: 18,561.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,147.76 : 45,221.10 = 12,374.56 : x
  2. Step 2: Convert to fraction form
    30,147.76/45,221.10 = 12,374.56/x
  3. Step 3: Cross multiply
    30,147.76x = 45,221.10 × 12,374.56
  4. Step 4: Simplify right side
    30,147.76x = 559,591,215.22
  5. Step 5: Solve for x
    x = 559,591,215.22/30,147.76
  6. Step 6: Final answer
    x = 18,561.62

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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.