Home / 15,297.09-21,109.05-8,581.47

Finding the Fourth Proportional to 15,297.09, 21,109.05 and 8,581.47

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Solution

The fourth proportional to 15,297.09, 21,109.05 and 8,581.47 is: 11,841.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,297.09 : 21,109.05 = 8,581.47 : x
  2. Step 2: Convert to fraction form
    15,297.09/21,109.05 = 8,581.47/x
  3. Step 3: Cross multiply
    15,297.09x = 21,109.05 × 8,581.47
  4. Step 4: Simplify right side
    15,297.09x = 181,146,679.30
  5. Step 5: Solve for x
    x = 181,146,679.30/15,297.09
  6. Step 6: Final answer
    x = 11,841.90

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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.