Home / 20,748.72-28,632.68-11,317.28

Finding the Fourth Proportional to 20,748.72, 28,632.68 and 11,317.28

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Solution

The fourth proportional to 20,748.72, 28,632.68 and 11,317.28 is: 15,617.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,748.72 : 28,632.68 = 11,317.28 : x
  2. Step 2: Convert to fraction form
    20,748.72/28,632.68 = 11,317.28/x
  3. Step 3: Cross multiply
    20,748.72x = 28,632.68 × 11,317.28
  4. Step 4: Simplify right side
    20,748.72x = 324,044,056.71
  5. Step 5: Solve for x
    x = 324,044,056.71/20,748.72
  6. Step 6: Final answer
    x = 15,617.54

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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.