Home / 20,874.19-28,802.13-12,372.57

Finding the Fourth Proportional to 20,874.19, 28,802.13 and 12,372.57

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Solution

The fourth proportional to 20,874.19, 28,802.13 and 12,372.57 is: 17,071.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.19 : 28,802.13 = 12,372.57 : x
  2. Step 2: Convert to fraction form
    20,874.19/28,802.13 = 12,372.57/x
  3. Step 3: Cross multiply
    20,874.19x = 28,802.13 × 12,372.57
  4. Step 4: Simplify right side
    20,874.19x = 356,356,369.57
  5. Step 5: Solve for x
    x = 356,356,369.57/20,874.19
  6. Step 6: Final answer
    x = 17,071.63

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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.