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Finding the Fourth Proportional to 28,061.60, 42,086.32 and 8,340.32

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Solution

The fourth proportional to 28,061.60, 42,086.32 and 8,340.32 is: 12,508.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,061.60 : 42,086.32 = 8,340.32 : x
  2. Step 2: Convert to fraction form
    28,061.60/42,086.32 = 8,340.32/x
  3. Step 3: Cross multiply
    28,061.60x = 42,086.32 × 8,340.32
  4. Step 4: Simplify right side
    28,061.60x = 351,013,376.42
  5. Step 5: Solve for x
    x = 351,013,376.42/28,061.60
  6. Step 6: Final answer
    x = 12,508.67

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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.