Home / 15,768.12-21,761.01-8,695.20

Finding the Fourth Proportional to 15,768.12, 21,761.01 and 8,695.20

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Solution

The fourth proportional to 15,768.12, 21,761.01 and 8,695.20 is: 11,999.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,768.12 : 21,761.01 = 8,695.20 : x
  2. Step 2: Convert to fraction form
    15,768.12/21,761.01 = 8,695.20/x
  3. Step 3: Cross multiply
    15,768.12x = 21,761.01 × 8,695.20
  4. Step 4: Simplify right side
    15,768.12x = 189,216,334.15
  5. Step 5: Solve for x
    x = 189,216,334.15/15,768.12
  6. Step 6: Final answer
    x = 11,999.93

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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.