Home / 18,720.40-25,839.12-10,763.52

Finding the Fourth Proportional to 18,720.40, 25,839.12 and 10,763.52

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Solution

The fourth proportional to 18,720.40, 25,839.12 and 10,763.52 is: 14,856.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.40 : 25,839.12 = 10,763.52 : x
  2. Step 2: Convert to fraction form
    18,720.40/25,839.12 = 10,763.52/x
  3. Step 3: Cross multiply
    18,720.40x = 25,839.12 × 10,763.52
  4. Step 4: Simplify right side
    18,720.40x = 278,119,884.90
  5. Step 5: Solve for x
    x = 278,119,884.90/18,720.40
  6. Step 6: Final answer
    x = 14,856.51

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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.