Home / 30,747.61-42,417.20-17,992.90

Finding the Fourth Proportional to 30,747.61, 42,417.20 and 17,992.90

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Solution

The fourth proportional to 30,747.61, 42,417.20 and 17,992.90 is: 24,821.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,747.61 : 42,417.20 = 17,992.90 : x
  2. Step 2: Convert to fraction form
    30,747.61/42,417.20 = 17,992.90/x
  3. Step 3: Cross multiply
    30,747.61x = 42,417.20 × 17,992.90
  4. Step 4: Simplify right side
    30,747.61x = 763,208,135.83
  5. Step 5: Solve for x
    x = 763,208,135.83/30,747.61
  6. Step 6: Final answer
    x = 24,821.71

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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.