Home / 31,278.85-43,165.37-17,130.78

Finding the Fourth Proportional to 31,278.85, 43,165.37 and 17,130.78

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Solution

The fourth proportional to 31,278.85, 43,165.37 and 17,130.78 is: 23,640.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,278.85 : 43,165.37 = 17,130.78 : x
  2. Step 2: Convert to fraction form
    31,278.85/43,165.37 = 17,130.78/x
  3. Step 3: Cross multiply
    31,278.85x = 43,165.37 × 17,130.78
  4. Step 4: Simplify right side
    31,278.85x = 739,456,457.09
  5. Step 5: Solve for x
    x = 739,456,457.09/31,278.85
  6. Step 6: Final answer
    x = 23,640.78

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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.