Home / 20,756.75-28,572.28-15,712.07

Finding the Fourth Proportional to 20,756.75, 28,572.28 and 15,712.07

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Solution

The fourth proportional to 20,756.75, 28,572.28 and 15,712.07 is: 21,628.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.75 : 28,572.28 = 15,712.07 : x
  2. Step 2: Convert to fraction form
    20,756.75/28,572.28 = 15,712.07/x
  3. Step 3: Cross multiply
    20,756.75x = 28,572.28 × 15,712.07
  4. Step 4: Simplify right side
    20,756.75x = 448,929,481.28
  5. Step 5: Solve for x
    x = 448,929,481.28/20,756.75
  6. Step 6: Final answer
    x = 21,628.13

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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.