Home / 28,255.32-42,381.59-10,489.43

Finding the Fourth Proportional to 28,255.32, 42,381.59 and 10,489.43

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Solution

The fourth proportional to 28,255.32, 42,381.59 and 10,489.43 is: 15,733.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,255.32 : 42,381.59 = 10,489.43 : x
  2. Step 2: Convert to fraction form
    28,255.32/42,381.59 = 10,489.43/x
  3. Step 3: Cross multiply
    28,255.32x = 42,381.59 × 10,489.43
  4. Step 4: Simplify right side
    28,255.32x = 444,558,775.10
  5. Step 5: Solve for x
    x = 444,558,775.10/28,255.32
  6. Step 6: Final answer
    x = 15,733.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.