Home / 20,899.29-31,348.94-10,503.75

Finding the Fourth Proportional to 20,899.29, 31,348.94 and 10,503.75

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Solution

The fourth proportional to 20,899.29, 31,348.94 and 10,503.75 is: 15,755.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.29 : 31,348.94 = 10,503.75 : x
  2. Step 2: Convert to fraction form
    20,899.29/31,348.94 = 10,503.75/x
  3. Step 3: Cross multiply
    20,899.29x = 31,348.94 × 10,503.75
  4. Step 4: Simplify right side
    20,899.29x = 329,281,376.01
  5. Step 5: Solve for x
    x = 329,281,376.01/20,899.29
  6. Step 6: Final answer
    x = 15,755.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.