Home / 20,707.16-28,575.86-11,275.79

Finding the Fourth Proportional to 20,707.16, 28,575.86 and 11,275.79

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Solution

The fourth proportional to 20,707.16, 28,575.86 and 11,275.79 is: 15,560.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.16 : 28,575.86 = 11,275.79 : x
  2. Step 2: Convert to fraction form
    20,707.16/28,575.86 = 11,275.79/x
  3. Step 3: Cross multiply
    20,707.16x = 28,575.86 × 11,275.79
  4. Step 4: Simplify right side
    20,707.16x = 322,215,197.17
  5. Step 5: Solve for x
    x = 322,215,197.17/20,707.16
  6. Step 6: Final answer
    x = 15,560.57

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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.