Home / 15,855.19-21,874.86-9,140.69

Finding the Fourth Proportional to 15,855.19, 21,874.86 and 9,140.69

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Solution

The fourth proportional to 15,855.19, 21,874.86 and 9,140.69 is: 12,611.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,855.19 : 21,874.86 = 9,140.69 : x
  2. Step 2: Convert to fraction form
    15,855.19/21,874.86 = 9,140.69/x
  3. Step 3: Cross multiply
    15,855.19x = 21,874.86 × 9,140.69
  4. Step 4: Simplify right side
    15,855.19x = 199,951,368.74
  5. Step 5: Solve for x
    x = 199,951,368.74/15,855.19
  6. Step 6: Final answer
    x = 12,611.10

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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.