Home / 13,248.20-19,872.30-7,999.40

Finding the Fourth Proportional to 13,248.20, 19,872.30 and 7,999.40

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Solution

The fourth proportional to 13,248.20, 19,872.30 and 7,999.40 is: 11,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,248.20 : 19,872.30 = 7,999.40 : x
  2. Step 2: Convert to fraction form
    13,248.20/19,872.30 = 7,999.40/x
  3. Step 3: Cross multiply
    13,248.20x = 19,872.30 × 7,999.40
  4. Step 4: Simplify right side
    13,248.20x = 158,966,476.62
  5. Step 5: Solve for x
    x = 158,966,476.62/13,248.20
  6. Step 6: Final answer
    x = 11,999.10

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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.