Home / 28,487.31-42,742.46-12,681.54

Finding the Fourth Proportional to 28,487.31, 42,742.46 and 12,681.54

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Solution

The fourth proportional to 28,487.31, 42,742.46 and 12,681.54 is: 19,027.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,487.31 : 42,742.46 = 12,681.54 : x
  2. Step 2: Convert to fraction form
    28,487.31/42,742.46 = 12,681.54/x
  3. Step 3: Cross multiply
    28,487.31x = 42,742.46 × 12,681.54
  4. Step 4: Simplify right side
    28,487.31x = 542,040,216.19
  5. Step 5: Solve for x
    x = 542,040,216.19/28,487.31
  6. Step 6: Final answer
    x = 19,027.43

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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.