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Finding the Fourth Proportional to 22,672.49, 31,287.80 and 12,980.66

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Solution

The fourth proportional to 22,672.49, 31,287.80 and 12,980.66 is: 17,913.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,672.49 : 31,287.80 = 12,980.66 : x
  2. Step 2: Convert to fraction form
    22,672.49/31,287.80 = 12,980.66/x
  3. Step 3: Cross multiply
    22,672.49x = 31,287.80 × 12,980.66
  4. Step 4: Simplify right side
    22,672.49x = 406,136,072.61
  5. Step 5: Solve for x
    x = 406,136,072.61/22,672.49
  6. Step 6: Final answer
    x = 17,913.17

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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.