Home / 38,013.78-52,457.70-20,786.55

Finding the Fourth Proportional to 38,013.78, 52,457.70 and 20,786.55

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Solution

The fourth proportional to 38,013.78, 52,457.70 and 20,786.55 is: 28,684.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,013.78 : 52,457.70 = 20,786.55 : x
  2. Step 2: Convert to fraction form
    38,013.78/52,457.70 = 20,786.55/x
  3. Step 3: Cross multiply
    38,013.78x = 52,457.70 × 20,786.55
  4. Step 4: Simplify right side
    38,013.78x = 1,090,414,500.00
  5. Step 5: Solve for x
    x = 1,090,414,500.00/38,013.78
  6. Step 6: Final answer
    x = 28,684.71

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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.