Home / 19,943.20-27,520.12-10,990.75

Finding the Fourth Proportional to 19,943.20, 27,520.12 and 10,990.75

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Solution

The fourth proportional to 19,943.20, 27,520.12 and 10,990.75 is: 15,166.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,943.20 : 27,520.12 = 10,990.75 : x
  2. Step 2: Convert to fraction form
    19,943.20/27,520.12 = 10,990.75/x
  3. Step 3: Cross multiply
    19,943.20x = 27,520.12 × 10,990.75
  4. Step 4: Simplify right side
    19,943.20x = 302,466,566.34
  5. Step 5: Solve for x
    x = 302,466,566.34/19,943.20
  6. Step 6: Final answer
    x = 15,166.40

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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.