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Finding the Fourth Proportional to 28,230.78, 42,352.71 and 10,700.76

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Solution

The fourth proportional to 28,230.78, 42,352.71 and 10,700.76 is: 16,053.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,230.78 : 42,352.71 = 10,700.76 : x
  2. Step 2: Convert to fraction form
    28,230.78/42,352.71 = 10,700.76/x
  3. Step 3: Cross multiply
    28,230.78x = 42,352.71 × 10,700.76
  4. Step 4: Simplify right side
    28,230.78x = 453,206,185.06
  5. Step 5: Solve for x
    x = 453,206,185.06/28,230.78
  6. Step 6: Final answer
    x = 16,053.62

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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.