Home / 22,910.65-31,618.94-12,840.80

Finding the Fourth Proportional to 22,910.65, 31,618.94 and 12,840.80

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Solution

The fourth proportional to 22,910.65, 31,618.94 and 12,840.80 is: 17,721.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,910.65 : 31,618.94 = 12,840.80 : x
  2. Step 2: Convert to fraction form
    22,910.65/31,618.94 = 12,840.80/x
  3. Step 3: Cross multiply
    22,910.65x = 31,618.94 × 12,840.80
  4. Step 4: Simplify right side
    22,910.65x = 406,012,262.45
  5. Step 5: Solve for x
    x = 406,012,262.45/22,910.65
  6. Step 6: Final answer
    x = 17,721.55

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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.