Home / 12,555.64-18,822.69-5,155.48

Finding the Fourth Proportional to 12,555.64, 18,822.69 and 5,155.48

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Solution

The fourth proportional to 12,555.64, 18,822.69 and 5,155.48 is: 7,728.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,555.64 : 18,822.69 = 5,155.48 : x
  2. Step 2: Convert to fraction form
    12,555.64/18,822.69 = 5,155.48/x
  3. Step 3: Cross multiply
    12,555.64x = 18,822.69 × 5,155.48
  4. Step 4: Simplify right side
    12,555.64x = 97,040,001.84
  5. Step 5: Solve for x
    x = 97,040,001.84/12,555.64
  6. Step 6: Final answer
    x = 7,728.80

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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.