Home / 20,486.10-28,269.09-11,532.90

Finding the Fourth Proportional to 20,486.10, 28,269.09 and 11,532.90

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Solution

The fourth proportional to 20,486.10, 28,269.09 and 11,532.90 is: 15,914.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.10 : 28,269.09 = 11,532.90 : x
  2. Step 2: Convert to fraction form
    20,486.10/28,269.09 = 11,532.90/x
  3. Step 3: Cross multiply
    20,486.10x = 28,269.09 × 11,532.90
  4. Step 4: Simplify right side
    20,486.10x = 326,024,588.06
  5. Step 5: Solve for x
    x = 326,024,588.06/20,486.10
  6. Step 6: Final answer
    x = 15,914.43

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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.