Home / 20,402.48-28,153.72-11,448.72

Finding the Fourth Proportional to 20,402.48, 28,153.72 and 11,448.72

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Solution

The fourth proportional to 20,402.48, 28,153.72 and 11,448.72 is: 15,798.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.48 : 28,153.72 = 11,448.72 : x
  2. Step 2: Convert to fraction form
    20,402.48/28,153.72 = 11,448.72/x
  3. Step 3: Cross multiply
    20,402.48x = 28,153.72 × 11,448.72
  4. Step 4: Simplify right side
    20,402.48x = 322,324,057.24
  5. Step 5: Solve for x
    x = 322,324,057.24/20,402.48
  6. Step 6: Final answer
    x = 15,798.28

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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.