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Finding the Fourth Proportional to 15,057.50, 20,779.35 and 9,169.50

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Solution

The fourth proportional to 15,057.50, 20,779.35 and 9,169.50 is: 12,653.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,057.50 : 20,779.35 = 9,169.50 : x
  2. Step 2: Convert to fraction form
    15,057.50/20,779.35 = 9,169.50/x
  3. Step 3: Cross multiply
    15,057.50x = 20,779.35 × 9,169.50
  4. Step 4: Simplify right side
    15,057.50x = 190,536,249.83
  5. Step 5: Solve for x
    x = 190,536,249.83/15,057.50
  6. Step 6: Final answer
    x = 12,653.91

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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.