Home / 15,035.81-20,749.01-8,321.72

Finding the Fourth Proportional to 15,035.81, 20,749.01 and 8,321.72

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Solution

The fourth proportional to 15,035.81, 20,749.01 and 8,321.72 is: 11,483.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,035.81 : 20,749.01 = 8,321.72 : x
  2. Step 2: Convert to fraction form
    15,035.81/20,749.01 = 8,321.72/x
  3. Step 3: Cross multiply
    15,035.81x = 20,749.01 × 8,321.72
  4. Step 4: Simplify right side
    15,035.81x = 172,667,306.14
  5. Step 5: Solve for x
    x = 172,667,306.14/15,035.81
  6. Step 6: Final answer
    x = 11,483.74

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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.