Home / 15,729.93-21,707.19-8,656.20

Finding the Fourth Proportional to 15,729.93, 21,707.19 and 8,656.20

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Solution

The fourth proportional to 15,729.93, 21,707.19 and 8,656.20 is: 11,945.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,729.93 : 21,707.19 = 8,656.20 : x
  2. Step 2: Convert to fraction form
    15,729.93/21,707.19 = 8,656.20/x
  3. Step 3: Cross multiply
    15,729.93x = 21,707.19 × 8,656.20
  4. Step 4: Simplify right side
    15,729.93x = 187,901,778.08
  5. Step 5: Solve for x
    x = 187,901,778.08/15,729.93
  6. Step 6: Final answer
    x = 11,945.49

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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.