Home / 15,729.93-21,707.46-8,656.47

Finding the Fourth Proportional to 15,729.93, 21,707.46 and 8,656.47

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Solution

The fourth proportional to 15,729.93, 21,707.46 and 8,656.47 is: 11,946.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,729.93 : 21,707.46 = 8,656.47 : x
  2. Step 2: Convert to fraction form
    15,729.93/21,707.46 = 8,656.47/x
  3. Step 3: Cross multiply
    15,729.93x = 21,707.46 × 8,656.47
  4. Step 4: Simplify right side
    15,729.93x = 187,909,976.27
  5. Step 5: Solve for x
    x = 187,909,976.27/15,729.93
  6. Step 6: Final answer
    x = 11,946.01

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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.