Home / 20,870.19-28,839.05-15,195.08

Finding the Fourth Proportional to 20,870.19, 28,839.05 and 15,195.08

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Solution

The fourth proportional to 20,870.19, 28,839.05 and 15,195.08 is: 20,997.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.19 : 28,839.05 = 15,195.08 : x
  2. Step 2: Convert to fraction form
    20,870.19/28,839.05 = 15,195.08/x
  3. Step 3: Cross multiply
    20,870.19x = 28,839.05 × 15,195.08
  4. Step 4: Simplify right side
    20,870.19x = 438,211,724.98
  5. Step 5: Solve for x
    x = 438,211,724.98/20,870.19
  6. Step 6: Final answer
    x = 20,997.02

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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.