Home / 28,455.07-42,678.85-8,731.97

Finding the Fourth Proportional to 28,455.07, 42,678.85 and 8,731.97

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Solution

The fourth proportional to 28,455.07, 42,678.85 and 8,731.97 is: 13,096.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,455.07 : 42,678.85 = 8,731.97 : x
  2. Step 2: Convert to fraction form
    28,455.07/42,678.85 = 8,731.97/x
  3. Step 3: Cross multiply
    28,455.07x = 42,678.85 × 8,731.97
  4. Step 4: Simplify right side
    28,455.07x = 372,670,437.83
  5. Step 5: Solve for x
    x = 372,670,437.83/28,455.07
  6. Step 6: Final answer
    x = 13,096.80

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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.