Home / 15,763.43-21,753.69-8,690.11

Finding the Fourth Proportional to 15,763.43, 21,753.69 and 8,690.11

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Solution

The fourth proportional to 15,763.43, 21,753.69 and 8,690.11 is: 11,992.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,763.43 : 21,753.69 = 8,690.11 : x
  2. Step 2: Convert to fraction form
    15,763.43/21,753.69 = 8,690.11/x
  3. Step 3: Cross multiply
    15,763.43x = 21,753.69 × 8,690.11
  4. Step 4: Simplify right side
    15,763.43x = 189,041,888.36
  5. Step 5: Solve for x
    x = 189,041,888.36/15,763.43
  6. Step 6: Final answer
    x = 11,992.43

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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.