Home / 12,872.19-17,765.30-7,209.10

Finding the Fourth Proportional to 12,872.19, 17,765.30 and 7,209.10

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Solution

The fourth proportional to 12,872.19, 17,765.30 and 7,209.10 is: 9,949.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,872.19 : 17,765.30 = 7,209.10 : x
  2. Step 2: Convert to fraction form
    12,872.19/17,765.30 = 7,209.10/x
  3. Step 3: Cross multiply
    12,872.19x = 17,765.30 × 7,209.10
  4. Step 4: Simplify right side
    12,872.19x = 128,071,699.36
  5. Step 5: Solve for x
    x = 128,071,699.36/12,872.19
  6. Step 6: Final answer
    x = 9,949.49

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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.