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Finding the Fourth Proportional to 12,930.20, 17,839.08 and 7,341.20

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Solution

The fourth proportional to 12,930.20, 17,839.08 and 7,341.20 is: 10,128.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,930.20 : 17,839.08 = 7,341.20 : x
  2. Step 2: Convert to fraction form
    12,930.20/17,839.08 = 7,341.20/x
  3. Step 3: Cross multiply
    12,930.20x = 17,839.08 × 7,341.20
  4. Step 4: Simplify right side
    12,930.20x = 130,960,254.10
  5. Step 5: Solve for x
    x = 130,960,254.10/12,930.20
  6. Step 6: Final answer
    x = 10,128.25

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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.