Home / 15,755.32-21,742.90-9,042.31

Finding the Fourth Proportional to 15,755.32, 21,742.90 and 9,042.31

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Solution

The fourth proportional to 15,755.32, 21,742.90 and 9,042.31 is: 12,478.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,755.32 : 21,742.90 = 9,042.31 : x
  2. Step 2: Convert to fraction form
    15,755.32/21,742.90 = 9,042.31/x
  3. Step 3: Cross multiply
    15,755.32x = 21,742.90 × 9,042.31
  4. Step 4: Simplify right side
    15,755.32x = 196,606,042.10
  5. Step 5: Solve for x
    x = 196,606,042.10/15,755.32
  6. Step 6: Final answer
    x = 12,478.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.