Home / 15,486.35-21,371.05-8,412.71

Finding the Fourth Proportional to 15,486.35, 21,371.05 and 8,412.71

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Solution

The fourth proportional to 15,486.35, 21,371.05 and 8,412.71 is: 11,609.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,486.35 : 21,371.05 = 8,412.71 : x
  2. Step 2: Convert to fraction form
    15,486.35/21,371.05 = 8,412.71/x
  3. Step 3: Cross multiply
    15,486.35x = 21,371.05 × 8,412.71
  4. Step 4: Simplify right side
    15,486.35x = 179,788,349.71
  5. Step 5: Solve for x
    x = 179,788,349.71/15,486.35
  6. Step 6: Final answer
    x = 11,609.48

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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.