Home / 28,431.72-42,657.17-17,889.30

Finding the Fourth Proportional to 28,431.72, 42,657.17 and 17,889.30

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Solution

The fourth proportional to 28,431.72, 42,657.17 and 17,889.30 is: 26,839.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.72 : 42,657.17 = 17,889.30 : x
  2. Step 2: Convert to fraction form
    28,431.72/42,657.17 = 17,889.30/x
  3. Step 3: Cross multiply
    28,431.72x = 42,657.17 × 17,889.30
  4. Step 4: Simplify right side
    28,431.72x = 763,106,821.83
  5. Step 5: Solve for x
    x = 763,106,821.83/28,431.72
  6. Step 6: Final answer
    x = 26,839.98

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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.