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Finding the Fourth Proportional to 14,422.73, 19,888.79 and 9,642.62

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Solution

The fourth proportional to 14,422.73, 19,888.79 and 9,642.62 is: 13,297.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,422.73 : 19,888.79 = 9,642.62 : x
  2. Step 2: Convert to fraction form
    14,422.73/19,888.79 = 9,642.62/x
  3. Step 3: Cross multiply
    14,422.73x = 19,888.79 × 9,642.62
  4. Step 4: Simplify right side
    14,422.73x = 191,780,044.04
  5. Step 5: Solve for x
    x = 191,780,044.04/14,422.73
  6. Step 6: Final answer
    x = 13,297.07

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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.