Home / 20,400.88-28,152.74-11,448.15

Finding the Fourth Proportional to 20,400.88, 28,152.74 and 11,448.15

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Solution

The fourth proportional to 20,400.88, 28,152.74 and 11,448.15 is: 15,798.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.88 : 28,152.74 = 11,448.15 : x
  2. Step 2: Convert to fraction form
    20,400.88/28,152.74 = 11,448.15/x
  3. Step 3: Cross multiply
    20,400.88x = 28,152.74 × 11,448.15
  4. Step 4: Simplify right side
    20,400.88x = 322,296,839.64
  5. Step 5: Solve for x
    x = 322,296,839.64/20,400.88
  6. Step 6: Final answer
    x = 15,798.18

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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.