Home / 20,949.28-28,916.13-12,457.38

Finding the Fourth Proportional to 20,949.28, 28,916.13 and 12,457.38

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Solution

The fourth proportional to 20,949.28, 28,916.13 and 12,457.38 is: 17,194.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.28 : 28,916.13 = 12,457.38 : x
  2. Step 2: Convert to fraction form
    20,949.28/28,916.13 = 12,457.38/x
  3. Step 3: Cross multiply
    20,949.28x = 28,916.13 × 12,457.38
  4. Step 4: Simplify right side
    20,949.28x = 360,219,220.76
  5. Step 5: Solve for x
    x = 360,219,220.76/20,949.28
  6. Step 6: Final answer
    x = 17,194.83

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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.