Home / 28,560.88-42,778.93-11,870.31

Finding the Fourth Proportional to 28,560.88, 42,778.93 and 11,870.31

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Solution

The fourth proportional to 28,560.88, 42,778.93 and 11,870.31 is: 17,779.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,560.88 : 42,778.93 = 11,870.31 : x
  2. Step 2: Convert to fraction form
    28,560.88/42,778.93 = 11,870.31/x
  3. Step 3: Cross multiply
    28,560.88x = 42,778.93 × 11,870.31
  4. Step 4: Simplify right side
    28,560.88x = 507,799,160.57
  5. Step 5: Solve for x
    x = 507,799,160.57/28,560.88
  6. Step 6: Final answer
    x = 17,779.53

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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.