Home / 31,151.80-42,987.98-17,721.79

Finding the Fourth Proportional to 31,151.80, 42,987.98 and 17,721.79

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Solution

The fourth proportional to 31,151.80, 42,987.98 and 17,721.79 is: 24,455.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,151.80 : 42,987.98 = 17,721.79 : x
  2. Step 2: Convert to fraction form
    31,151.80/42,987.98 = 17,721.79/x
  3. Step 3: Cross multiply
    31,151.80x = 42,987.98 × 17,721.79
  4. Step 4: Simplify right side
    31,151.80x = 761,823,954.08
  5. Step 5: Solve for x
    x = 761,823,954.08/31,151.80
  6. Step 6: Final answer
    x = 24,455.21

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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.