Home / 20,910.83-28,840.05-18,387.68

Finding the Fourth Proportional to 20,910.83, 28,840.05 and 18,387.68

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Solution

The fourth proportional to 20,910.83, 28,840.05 and 18,387.68 is: 25,360.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.83 : 28,840.05 = 18,387.68 : x
  2. Step 2: Convert to fraction form
    20,910.83/28,840.05 = 18,387.68/x
  3. Step 3: Cross multiply
    20,910.83x = 28,840.05 × 18,387.68
  4. Step 4: Simplify right side
    20,910.83x = 530,301,466.38
  5. Step 5: Solve for x
    x = 530,301,466.38/20,910.83
  6. Step 6: Final answer
    x = 25,360.14

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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.