Home / 20,949.17-28,915.31-13,873.01

Finding the Fourth Proportional to 20,949.17, 28,915.31 and 13,873.01

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Solution

The fourth proportional to 20,949.17, 28,915.31 and 13,873.01 is: 19,148.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.17 : 28,915.31 = 13,873.01 : x
  2. Step 2: Convert to fraction form
    20,949.17/28,915.31 = 13,873.01/x
  3. Step 3: Cross multiply
    20,949.17x = 28,915.31 × 13,873.01
  4. Step 4: Simplify right side
    20,949.17x = 401,142,387.71
  5. Step 5: Solve for x
    x = 401,142,387.71/20,949.17
  6. Step 6: Final answer
    x = 19,148.36

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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.