Home / 20,340.13-28,066.15-11,388.01

Finding the Fourth Proportional to 20,340.13, 28,066.15 and 11,388.01

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Solution

The fourth proportional to 20,340.13, 28,066.15 and 11,388.01 is: 15,713.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,340.13 : 28,066.15 = 11,388.01 : x
  2. Step 2: Convert to fraction form
    20,340.13/28,066.15 = 11,388.01/x
  3. Step 3: Cross multiply
    20,340.13x = 28,066.15 × 11,388.01
  4. Step 4: Simplify right side
    20,340.13x = 319,617,596.86
  5. Step 5: Solve for x
    x = 319,617,596.86/20,340.13
  6. Step 6: Final answer
    x = 15,713.65

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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.