Home / 15,486.30-21,370.29-8,412.71

Finding the Fourth Proportional to 15,486.30, 21,370.29 and 8,412.71

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Solution

The fourth proportional to 15,486.30, 21,370.29 and 8,412.71 is: 11,609.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,486.30 : 21,370.29 = 8,412.71 : x
  2. Step 2: Convert to fraction form
    15,486.30/21,370.29 = 8,412.71/x
  3. Step 3: Cross multiply
    15,486.30x = 21,370.29 × 8,412.71
  4. Step 4: Simplify right side
    15,486.30x = 179,782,052.39
  5. Step 5: Solve for x
    x = 179,782,052.39/15,486.30
  6. Step 6: Final answer
    x = 11,609.10

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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.