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Finding the Fourth Proportional to 22,304.48, 30,780.48 and 12,871.28

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Solution

The fourth proportional to 22,304.48, 30,780.48 and 12,871.28 is: 17,762.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,304.48 : 30,780.48 = 12,871.28 : x
  2. Step 2: Convert to fraction form
    22,304.48/30,780.48 = 12,871.28/x
  3. Step 3: Cross multiply
    22,304.48x = 30,780.48 × 12,871.28
  4. Step 4: Simplify right side
    22,304.48x = 396,184,176.61
  5. Step 5: Solve for x
    x = 396,184,176.61/22,304.48
  6. Step 6: Final answer
    x = 17,762.54

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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.