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Finding the Fourth Proportional to 15,057.89, 20,779.58 and 8,343.50

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Solution

The fourth proportional to 15,057.89, 20,779.58 and 8,343.50 is: 11,513.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,057.89 : 20,779.58 = 8,343.50 : x
  2. Step 2: Convert to fraction form
    15,057.89/20,779.58 = 8,343.50/x
  3. Step 3: Cross multiply
    15,057.89x = 20,779.58 × 8,343.50
  4. Step 4: Simplify right side
    15,057.89x = 173,374,311.40
  5. Step 5: Solve for x
    x = 173,374,311.40/15,057.89
  6. Step 6: Final answer
    x = 11,513.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.