Home / 20,801.57-28,706.09-11,370.13

Finding the Fourth Proportional to 20,801.57, 28,706.09 and 11,370.13

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Solution

The fourth proportional to 20,801.57, 28,706.09 and 11,370.13 is: 15,690.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.57 : 28,706.09 = 11,370.13 : x
  2. Step 2: Convert to fraction form
    20,801.57/28,706.09 = 11,370.13/x
  3. Step 3: Cross multiply
    20,801.57x = 28,706.09 × 11,370.13
  4. Step 4: Simplify right side
    20,801.57x = 326,391,846.48
  5. Step 5: Solve for x
    x = 326,391,846.48/20,801.57
  6. Step 6: Final answer
    x = 15,690.74

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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.