Home / 15,418.96-21,267.16-9,678.08

Finding the Fourth Proportional to 15,418.96, 21,267.16 and 9,678.08

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Solution

The fourth proportional to 15,418.96, 21,267.16 and 9,678.08 is: 13,348.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,418.96 : 21,267.16 = 9,678.08 : x
  2. Step 2: Convert to fraction form
    15,418.96/21,267.16 = 9,678.08/x
  3. Step 3: Cross multiply
    15,418.96x = 21,267.16 × 9,678.08
  4. Step 4: Simplify right side
    15,418.96x = 205,825,304.83
  5. Step 5: Solve for x
    x = 205,825,304.83/15,418.96
  6. Step 6: Final answer
    x = 13,348.85

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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.