Home / 28,400.31-42,600.56-8,678.78

Finding the Fourth Proportional to 28,400.31, 42,600.56 and 8,678.78

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Solution

The fourth proportional to 28,400.31, 42,600.56 and 8,678.78 is: 13,018.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,400.31 : 42,600.56 = 8,678.78 : x
  2. Step 2: Convert to fraction form
    28,400.31/42,600.56 = 8,678.78/x
  3. Step 3: Cross multiply
    28,400.31x = 42,600.56 × 8,678.78
  4. Step 4: Simplify right side
    28,400.31x = 369,721,016.32
  5. Step 5: Solve for x
    x = 369,721,016.32/28,400.31
  6. Step 6: Final answer
    x = 13,018.20

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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.