Home / 28,188.49-38,899.69-15,441.57

Finding the Fourth Proportional to 28,188.49, 38,899.69 and 15,441.57

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Solution

The fourth proportional to 28,188.49, 38,899.69 and 15,441.57 is: 21,309.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,188.49 : 38,899.69 = 15,441.57 : x
  2. Step 2: Convert to fraction form
    28,188.49/38,899.69 = 15,441.57/x
  3. Step 3: Cross multiply
    28,188.49x = 38,899.69 × 15,441.57
  4. Step 4: Simplify right side
    28,188.49x = 600,672,286.11
  5. Step 5: Solve for x
    x = 600,672,286.11/28,188.49
  6. Step 6: Final answer
    x = 21,309.13

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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.