Home / 15,729.96-21,707.70-8,656.83

Finding the Fourth Proportional to 15,729.96, 21,707.70 and 8,656.83

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Solution

The fourth proportional to 15,729.96, 21,707.70 and 8,656.83 is: 11,946.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,729.96 : 21,707.70 = 8,656.83 : x
  2. Step 2: Convert to fraction form
    15,729.96/21,707.70 = 8,656.83/x
  3. Step 3: Cross multiply
    15,729.96x = 21,707.70 × 8,656.83
  4. Step 4: Simplify right side
    15,729.96x = 187,919,868.59
  5. Step 5: Solve for x
    x = 187,919,868.59/15,729.96
  6. Step 6: Final answer
    x = 11,946.62

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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.