Home / 20,812.67-28,721.49-11,381.23

Finding the Fourth Proportional to 20,812.67, 28,721.49 and 11,381.23

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Solution

The fourth proportional to 20,812.67, 28,721.49 and 11,381.23 is: 15,706.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.67 : 28,721.49 = 11,381.23 : x
  2. Step 2: Convert to fraction form
    20,812.67/28,721.49 = 11,381.23/x
  3. Step 3: Cross multiply
    20,812.67x = 28,721.49 × 11,381.23
  4. Step 4: Simplify right side
    20,812.67x = 326,885,883.63
  5. Step 5: Solve for x
    x = 326,885,883.63/20,812.67
  6. Step 6: Final answer
    x = 15,706.10

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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.