Home / 18,281.55-27,420.20-5,135.05

Finding the Fourth Proportional to 18,281.55, 27,420.20 and 5,135.05

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Solution

The fourth proportional to 18,281.55, 27,420.20 and 5,135.05 is: 7,701.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,281.55 : 27,420.20 = 5,135.05 : x
  2. Step 2: Convert to fraction form
    18,281.55/27,420.20 = 5,135.05/x
  3. Step 3: Cross multiply
    18,281.55x = 27,420.20 × 5,135.05
  4. Step 4: Simplify right side
    18,281.55x = 140,804,098.01
  5. Step 5: Solve for x
    x = 140,804,098.01/18,281.55
  6. Step 6: Final answer
    x = 7,701.98

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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.