Home / 15,861.06-21,883.30-9,145.78

Finding the Fourth Proportional to 15,861.06, 21,883.30 and 9,145.78

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Solution

The fourth proportional to 15,861.06, 21,883.30 and 9,145.78 is: 12,618.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,861.06 : 21,883.30 = 9,145.78 : x
  2. Step 2: Convert to fraction form
    15,861.06/21,883.30 = 9,145.78/x
  3. Step 3: Cross multiply
    15,861.06x = 21,883.30 × 9,145.78
  4. Step 4: Simplify right side
    15,861.06x = 200,139,847.47
  5. Step 5: Solve for x
    x = 200,139,847.47/15,861.06
  6. Step 6: Final answer
    x = 12,618.31

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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.