Home / 20,868.30-28,796.31-11,437.02

Finding the Fourth Proportional to 20,868.30, 28,796.31 and 11,437.02

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Solution

The fourth proportional to 20,868.30, 28,796.31 and 11,437.02 is: 15,782.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.30 : 28,796.31 = 11,437.02 : x
  2. Step 2: Convert to fraction form
    20,868.30/28,796.31 = 11,437.02/x
  3. Step 3: Cross multiply
    20,868.30x = 28,796.31 × 11,437.02
  4. Step 4: Simplify right side
    20,868.30x = 329,343,973.40
  5. Step 5: Solve for x
    x = 329,343,973.40/20,868.30
  6. Step 6: Final answer
    x = 15,782.02

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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.