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Finding the Fourth Proportional to 57,858.30, 86,800.51 and 20,418.76

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Solution

The fourth proportional to 57,858.30, 86,800.51 and 20,418.76 is: 30,632.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,858.30 : 86,800.51 = 20,418.76 : x
  2. Step 2: Convert to fraction form
    57,858.30/86,800.51 = 20,418.76/x
  3. Step 3: Cross multiply
    57,858.30x = 86,800.51 × 20,418.76
  4. Step 4: Simplify right side
    57,858.30x = 1,772,358,671.47
  5. Step 5: Solve for x
    x = 1,772,358,671.47/57,858.30
  6. Step 6: Final answer
    x = 30,632.75

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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.