Home / 15,309.87-21,119.61-9,633.90

Finding the Fourth Proportional to 15,309.87, 21,119.61 and 9,633.90

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Solution

The fourth proportional to 15,309.87, 21,119.61 and 9,633.90 is: 13,289.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,309.87 : 21,119.61 = 9,633.90 : x
  2. Step 2: Convert to fraction form
    15,309.87/21,119.61 = 9,633.90/x
  3. Step 3: Cross multiply
    15,309.87x = 21,119.61 × 9,633.90
  4. Step 4: Simplify right side
    15,309.87x = 203,464,210.78
  5. Step 5: Solve for x
    x = 203,464,210.78/15,309.87
  6. Step 6: Final answer
    x = 13,289.74

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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.