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Finding the Fourth Proportional to 15,291.84, 22,918.42 and 8,721.73

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Solution

The fourth proportional to 15,291.84, 22,918.42 and 8,721.73 is: 13,071.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,291.84 : 22,918.42 = 8,721.73 : x
  2. Step 2: Convert to fraction form
    15,291.84/22,918.42 = 8,721.73/x
  3. Step 3: Cross multiply
    15,291.84x = 22,918.42 × 8,721.73
  4. Step 4: Simplify right side
    15,291.84x = 199,888,271.27
  5. Step 5: Solve for x
    x = 199,888,271.27/15,291.84
  6. Step 6: Final answer
    x = 13,071.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.