Home / 15,763.89-21,753.19-8,690.30

Finding the Fourth Proportional to 15,763.89, 21,753.19 and 8,690.30

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Solution

The fourth proportional to 15,763.89, 21,753.19 and 8,690.30 is: 11,992.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,763.89 : 21,753.19 = 8,690.30 : x
  2. Step 2: Convert to fraction form
    15,763.89/21,753.19 = 8,690.30/x
  3. Step 3: Cross multiply
    15,763.89x = 21,753.19 × 8,690.30
  4. Step 4: Simplify right side
    15,763.89x = 189,041,747.06
  5. Step 5: Solve for x
    x = 189,041,747.06/15,763.89
  6. Step 6: Final answer
    x = 11,992.07

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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.