Home / 15,029.35-20,740.58-8,315.21

Finding the Fourth Proportional to 15,029.35, 20,740.58 and 8,315.21

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Solution

The fourth proportional to 15,029.35, 20,740.58 and 8,315.21 is: 11,475.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,029.35 : 20,740.58 = 8,315.21 : x
  2. Step 2: Convert to fraction form
    15,029.35/20,740.58 = 8,315.21/x
  3. Step 3: Cross multiply
    15,029.35x = 20,740.58 × 8,315.21
  4. Step 4: Simplify right side
    15,029.35x = 172,462,350.86
  5. Step 5: Solve for x
    x = 172,462,350.86/15,029.35
  6. Step 6: Final answer
    x = 11,475.04

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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.