Home / 12,555.75-18,822.87-5,155.59

Finding the Fourth Proportional to 12,555.75, 18,822.87 and 5,155.59

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Solution

The fourth proportional to 12,555.75, 18,822.87 and 5,155.59 is: 7,728.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,555.75 : 18,822.87 = 5,155.59 : x
  2. Step 2: Convert to fraction form
    12,555.75/18,822.87 = 5,155.59/x
  3. Step 3: Cross multiply
    12,555.75x = 18,822.87 × 5,155.59
  4. Step 4: Simplify right side
    12,555.75x = 97,043,000.34
  5. Step 5: Solve for x
    x = 97,043,000.34/12,555.75
  6. Step 6: Final answer
    x = 7,728.97

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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.