Home / 20,978.48-28,941.14-13,799.18

Finding the Fourth Proportional to 20,978.48, 28,941.14 and 13,799.18

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Solution

The fourth proportional to 20,978.48, 28,941.14 and 13,799.18 is: 19,036.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,978.48 : 28,941.14 = 13,799.18 : x
  2. Step 2: Convert to fraction form
    20,978.48/28,941.14 = 13,799.18/x
  3. Step 3: Cross multiply
    20,978.48x = 28,941.14 × 13,799.18
  4. Step 4: Simplify right side
    20,978.48x = 399,364,107.12
  5. Step 5: Solve for x
    x = 399,364,107.12/20,978.48
  6. Step 6: Final answer
    x = 19,036.84

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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.