Home / 20,581.06-28,401.86-11,149.62

Finding the Fourth Proportional to 20,581.06, 28,401.86 and 11,149.62

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Solution

The fourth proportional to 20,581.06, 28,401.86 and 11,149.62 is: 15,386.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.06 : 28,401.86 = 11,149.62 : x
  2. Step 2: Convert to fraction form
    20,581.06/28,401.86 = 11,149.62/x
  3. Step 3: Cross multiply
    20,581.06x = 28,401.86 × 11,149.62
  4. Step 4: Simplify right side
    20,581.06x = 316,669,946.29
  5. Step 5: Solve for x
    x = 316,669,946.29/20,581.06
  6. Step 6: Final answer
    x = 15,386.47

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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.