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Finding the Fourth Proportional to 28,231.60, 42,364.20 and 10,703.20

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Solution

The fourth proportional to 28,231.60, 42,364.20 and 10,703.20 is: 16,061.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,231.60 : 42,364.20 = 10,703.20 : x
  2. Step 2: Convert to fraction form
    28,231.60/42,364.20 = 10,703.20/x
  3. Step 3: Cross multiply
    28,231.60x = 42,364.20 × 10,703.20
  4. Step 4: Simplify right side
    28,231.60x = 453,432,505.44
  5. Step 5: Solve for x
    x = 453,432,505.44/28,231.60
  6. Step 6: Final answer
    x = 16,061.17

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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.