Home / 20,759.50-28,661.07-13,320.46

Finding the Fourth Proportional to 20,759.50, 28,661.07 and 13,320.46

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Solution

The fourth proportional to 20,759.50, 28,661.07 and 13,320.46 is: 18,390.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,759.50 : 28,661.07 = 13,320.46 : x
  2. Step 2: Convert to fraction form
    20,759.50/28,661.07 = 13,320.46/x
  3. Step 3: Cross multiply
    20,759.50x = 28,661.07 × 13,320.46
  4. Step 4: Simplify right side
    20,759.50x = 381,778,636.49
  5. Step 5: Solve for x
    x = 381,778,636.49/20,759.50
  6. Step 6: Final answer
    x = 18,390.55

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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.