Home / 28,616.49-39,489.66-15,870.20

Finding the Fourth Proportional to 28,616.49, 39,489.66 and 15,870.20

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Solution

The fourth proportional to 28,616.49, 39,489.66 and 15,870.20 is: 21,900.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,616.49 : 39,489.66 = 15,870.20 : x
  2. Step 2: Convert to fraction form
    28,616.49/39,489.66 = 15,870.20/x
  3. Step 3: Cross multiply
    28,616.49x = 39,489.66 × 15,870.20
  4. Step 4: Simplify right side
    28,616.49x = 626,708,604.68
  5. Step 5: Solve for x
    x = 626,708,604.68/28,616.49
  6. Step 6: Final answer
    x = 21,900.26

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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.