Home / 15,354.19-21,188.75-8,639.83

Finding the Fourth Proportional to 15,354.19, 21,188.75 and 8,639.83

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Solution

The fourth proportional to 15,354.19, 21,188.75 and 8,639.83 is: 11,922.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,354.19 : 21,188.75 = 8,639.83 : x
  2. Step 2: Convert to fraction form
    15,354.19/21,188.75 = 8,639.83/x
  3. Step 3: Cross multiply
    15,354.19x = 21,188.75 × 8,639.83
  4. Step 4: Simplify right side
    15,354.19x = 183,067,181.20
  5. Step 5: Solve for x
    x = 183,067,181.20/15,354.19
  6. Step 6: Final answer
    x = 11,922.95

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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.