Home / 20,918.17-28,866.71-11,486.66

Finding the Fourth Proportional to 20,918.17, 28,866.71 and 11,486.66

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Solution

The fourth proportional to 20,918.17, 28,866.71 and 11,486.66 is: 15,851.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.17 : 28,866.71 = 11,486.66 : x
  2. Step 2: Convert to fraction form
    20,918.17/28,866.71 = 11,486.66/x
  3. Step 3: Cross multiply
    20,918.17x = 28,866.71 × 11,486.66
  4. Step 4: Simplify right side
    20,918.17x = 331,582,097.82
  5. Step 5: Solve for x
    x = 331,582,097.82/20,918.17
  6. Step 6: Final answer
    x = 15,851.39

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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.