Home / 20,790.65-28,691.75-11,359.01

Finding the Fourth Proportional to 20,790.65, 28,691.75 and 11,359.01

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Solution

The fourth proportional to 20,790.65, 28,691.75 and 11,359.01 is: 15,675.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.65 : 28,691.75 = 11,359.01 : x
  2. Step 2: Convert to fraction form
    20,790.65/28,691.75 = 11,359.01/x
  3. Step 3: Cross multiply
    20,790.65x = 28,691.75 × 11,359.01
  4. Step 4: Simplify right side
    20,790.65x = 325,909,875.17
  5. Step 5: Solve for x
    x = 325,909,875.17/20,790.65
  6. Step 6: Final answer
    x = 15,675.79

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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.