Home / 15,486.14-21,370.86-8,412.72

Finding the Fourth Proportional to 15,486.14, 21,370.86 and 8,412.72

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Solution

The fourth proportional to 15,486.14, 21,370.86 and 8,412.72 is: 11,609.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,486.14 : 21,370.86 = 8,412.72 : x
  2. Step 2: Convert to fraction form
    15,486.14/21,370.86 = 8,412.72/x
  3. Step 3: Cross multiply
    15,486.14x = 21,370.86 × 8,412.72
  4. Step 4: Simplify right side
    15,486.14x = 179,787,061.34
  5. Step 5: Solve for x
    x = 179,787,061.34/15,486.14
  6. Step 6: Final answer
    x = 11,609.55

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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.