Home / 30,153.76-45,230.10-12,380.56

Finding the Fourth Proportional to 30,153.76, 45,230.10 and 12,380.56

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Solution

The fourth proportional to 30,153.76, 45,230.10 and 12,380.56 is: 18,570.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,153.76 : 45,230.10 = 12,380.56 : x
  2. Step 2: Convert to fraction form
    30,153.76/45,230.10 = 12,380.56/x
  3. Step 3: Cross multiply
    30,153.76x = 45,230.10 × 12,380.56
  4. Step 4: Simplify right side
    30,153.76x = 559,973,966.86
  5. Step 5: Solve for x
    x = 559,973,966.86/30,153.76
  6. Step 6: Final answer
    x = 18,570.62

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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.