Home / 15,304.80-21,115.44-9,719.04

Finding the Fourth Proportional to 15,304.80, 21,115.44 and 9,719.04

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Solution

The fourth proportional to 15,304.80, 21,115.44 and 9,719.04 is: 13,408.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,304.80 : 21,115.44 = 9,719.04 : x
  2. Step 2: Convert to fraction form
    15,304.80/21,115.44 = 9,719.04/x
  3. Step 3: Cross multiply
    15,304.80x = 21,115.44 × 9,719.04
  4. Step 4: Simplify right side
    15,304.80x = 205,221,805.98
  5. Step 5: Solve for x
    x = 205,221,805.98/15,304.80
  6. Step 6: Final answer
    x = 13,408.98

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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.