Home / 31,108.20-42,929.10-17,678.40

Finding the Fourth Proportional to 31,108.20, 42,929.10 and 17,678.40

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Solution

The fourth proportional to 31,108.20, 42,929.10 and 17,678.40 is: 24,396.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,108.20 : 42,929.10 = 17,678.40 : x
  2. Step 2: Convert to fraction form
    31,108.20/42,929.10 = 17,678.40/x
  3. Step 3: Cross multiply
    31,108.20x = 42,929.10 × 17,678.40
  4. Step 4: Simplify right side
    31,108.20x = 758,917,801.44
  5. Step 5: Solve for x
    x = 758,917,801.44/31,108.20
  6. Step 6: Final answer
    x = 24,396.07

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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.