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Finding the Fourth Proportional to 28,246.80, 42,343.80 and 10,728.40

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Solution

The fourth proportional to 28,246.80, 42,343.80 and 10,728.40 is: 16,082.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,246.80 : 42,343.80 = 10,728.40 : x
  2. Step 2: Convert to fraction form
    28,246.80/42,343.80 = 10,728.40/x
  3. Step 3: Cross multiply
    28,246.80x = 42,343.80 × 10,728.40
  4. Step 4: Simplify right side
    28,246.80x = 454,281,223.92
  5. Step 5: Solve for x
    x = 454,281,223.92/28,246.80
  6. Step 6: Final answer
    x = 16,082.57

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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.