Home / 28,140.96-38,836.32-18,703.20

Finding the Fourth Proportional to 28,140.96, 38,836.32 and 18,703.20

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Solution

The fourth proportional to 28,140.96, 38,836.32 and 18,703.20 is: 25,811.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,140.96 : 38,836.32 = 18,703.20 : x
  2. Step 2: Convert to fraction form
    28,140.96/38,836.32 = 18,703.20/x
  3. Step 3: Cross multiply
    28,140.96x = 38,836.32 × 18,703.20
  4. Step 4: Simplify right side
    28,140.96x = 726,363,460.22
  5. Step 5: Solve for x
    x = 726,363,460.22/28,140.96
  6. Step 6: Final answer
    x = 25,811.61

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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.