Home / 28,126.41-38,815.01-15,380.39

Finding the Fourth Proportional to 28,126.41, 38,815.01 and 15,380.39

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Solution

The fourth proportional to 28,126.41, 38,815.01 and 15,380.39 is: 21,225.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,126.41 : 38,815.01 = 15,380.39 : x
  2. Step 2: Convert to fraction form
    28,126.41/38,815.01 = 15,380.39/x
  3. Step 3: Cross multiply
    28,126.41x = 38,815.01 × 15,380.39
  4. Step 4: Simplify right side
    28,126.41x = 596,989,991.65
  5. Step 5: Solve for x
    x = 596,989,991.65/28,126.41
  6. Step 6: Final answer
    x = 21,225.25

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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.