Home / 20,582.25-28,403.50-11,150.81

Finding the Fourth Proportional to 20,582.25, 28,403.50 and 11,150.81

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Solution

The fourth proportional to 20,582.25, 28,403.50 and 11,150.81 is: 15,388.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,582.25 : 28,403.50 = 11,150.81 : x
  2. Step 2: Convert to fraction form
    20,582.25/28,403.50 = 11,150.81/x
  3. Step 3: Cross multiply
    20,582.25x = 28,403.50 × 11,150.81
  4. Step 4: Simplify right side
    20,582.25x = 316,722,031.84
  5. Step 5: Solve for x
    x = 316,722,031.84/20,582.25
  6. Step 6: Final answer
    x = 15,388.12

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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.