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Finding the Fourth Proportional to 22,402.80, 30,914.40 and 12,329.28

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Solution

The fourth proportional to 22,402.80, 30,914.40 and 12,329.28 is: 17,013.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,402.80 : 30,914.40 = 12,329.28 : x
  2. Step 2: Convert to fraction form
    22,402.80/30,914.40 = 12,329.28/x
  3. Step 3: Cross multiply
    22,402.80x = 30,914.40 × 12,329.28
  4. Step 4: Simplify right side
    22,402.80x = 381,152,293.63
  5. Step 5: Solve for x
    x = 381,152,293.63/22,402.80
  6. Step 6: Final answer
    x = 17,013.60

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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.