Home / 15,659.75-21,610.53-8,489.68

Finding the Fourth Proportional to 15,659.75, 21,610.53 and 8,489.68

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Solution

The fourth proportional to 15,659.75, 21,610.53 and 8,489.68 is: 11,715.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,659.75 : 21,610.53 = 8,489.68 : x
  2. Step 2: Convert to fraction form
    15,659.75/21,610.53 = 8,489.68/x
  3. Step 3: Cross multiply
    15,659.75x = 21,610.53 × 8,489.68
  4. Step 4: Simplify right side
    15,659.75x = 183,466,430.30
  5. Step 5: Solve for x
    x = 183,466,430.30/15,659.75
  6. Step 6: Final answer
    x = 11,715.79

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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.