Home / 20,707.35-28,578.78-15,417.24

Finding the Fourth Proportional to 20,707.35, 28,578.78 and 15,417.24

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Solution

The fourth proportional to 20,707.35, 28,578.78 and 15,417.24 is: 21,277.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.35 : 28,578.78 = 15,417.24 : x
  2. Step 2: Convert to fraction form
    20,707.35/28,578.78 = 15,417.24/x
  3. Step 3: Cross multiply
    20,707.35x = 28,578.78 × 15,417.24
  4. Step 4: Simplify right side
    20,707.35x = 440,605,910.17
  5. Step 5: Solve for x
    x = 440,605,910.17/20,707.35
  6. Step 6: Final answer
    x = 21,277.75

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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.