Home / 28,219.92-42,330.60-8,499.12

Finding the Fourth Proportional to 28,219.92, 42,330.60 and 8,499.12

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Solution

The fourth proportional to 28,219.92, 42,330.60 and 8,499.12 is: 12,748.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,219.92 : 42,330.60 = 8,499.12 : x
  2. Step 2: Convert to fraction form
    28,219.92/42,330.60 = 8,499.12/x
  3. Step 3: Cross multiply
    28,219.92x = 42,330.60 × 8,499.12
  4. Step 4: Simplify right side
    28,219.92x = 359,772,849.07
  5. Step 5: Solve for x
    x = 359,772,849.07/28,219.92
  6. Step 6: Final answer
    x = 12,748.90

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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.