Home / 20,905.86-31,350.61-7,575.69

Finding the Fourth Proportional to 20,905.86, 31,350.61 and 7,575.69

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Solution

The fourth proportional to 20,905.86, 31,350.61 and 7,575.69 is: 11,360.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.86 : 31,350.61 = 7,575.69 : x
  2. Step 2: Convert to fraction form
    20,905.86/31,350.61 = 7,575.69/x
  3. Step 3: Cross multiply
    20,905.86x = 31,350.61 × 7,575.69
  4. Step 4: Simplify right side
    20,905.86x = 237,502,502.67
  5. Step 5: Solve for x
    x = 237,502,502.67/20,905.86
  6. Step 6: Final answer
    x = 11,360.57

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1.5x scale

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.