Home / 15,029.75-20,741.40-8,315.49

Finding the Fourth Proportional to 15,029.75, 20,741.40 and 8,315.49

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Solution

The fourth proportional to 15,029.75, 20,741.40 and 8,315.49 is: 11,475.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,029.75 : 20,741.40 = 8,315.49 : x
  2. Step 2: Convert to fraction form
    15,029.75/20,741.40 = 8,315.49/x
  3. Step 3: Cross multiply
    15,029.75x = 20,741.40 × 8,315.49
  4. Step 4: Simplify right side
    15,029.75x = 172,474,982.07
  5. Step 5: Solve for x
    x = 172,474,982.07/15,029.75
  6. Step 6: Final answer
    x = 11,475.57

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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.