Home / 28,854.81-39,820.31-18,100.14

Finding the Fourth Proportional to 28,854.81, 39,820.31 and 18,100.14

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Solution

The fourth proportional to 28,854.81, 39,820.31 and 18,100.14 is: 24,978.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,854.81 : 39,820.31 = 18,100.14 : x
  2. Step 2: Convert to fraction form
    28,854.81/39,820.31 = 18,100.14/x
  3. Step 3: Cross multiply
    28,854.81x = 39,820.31 × 18,100.14
  4. Step 4: Simplify right side
    28,854.81x = 720,753,013.89
  5. Step 5: Solve for x
    x = 720,753,013.89/28,854.81
  6. Step 6: Final answer
    x = 24,978.61

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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.