Home / 29,121.91-40,165.13-18,901.78

Finding the Fourth Proportional to 29,121.91, 40,165.13 and 18,901.78

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Solution

The fourth proportional to 29,121.91, 40,165.13 and 18,901.78 is: 26,069.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,121.91 : 40,165.13 = 18,901.78 : x
  2. Step 2: Convert to fraction form
    29,121.91/40,165.13 = 18,901.78/x
  3. Step 3: Cross multiply
    29,121.91x = 40,165.13 × 18,901.78
  4. Step 4: Simplify right side
    29,121.91x = 759,192,397.77
  5. Step 5: Solve for x
    x = 759,192,397.77/29,121.91
  6. Step 6: Final answer
    x = 26,069.46

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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.