Home / 20,870.97-28,802.03-11,439.69

Finding the Fourth Proportional to 20,870.97, 28,802.03 and 11,439.69

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Solution

The fourth proportional to 20,870.97, 28,802.03 and 11,439.69 is: 15,786.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.97 : 28,802.03 = 11,439.69 : x
  2. Step 2: Convert to fraction form
    20,870.97/28,802.03 = 11,439.69/x
  3. Step 3: Cross multiply
    20,870.97x = 28,802.03 × 11,439.69
  4. Step 4: Simplify right side
    20,870.97x = 329,486,294.57
  5. Step 5: Solve for x
    x = 329,486,294.57/20,870.97
  6. Step 6: Final answer
    x = 15,786.82

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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.