Home / 20,564.59-28,378.61-11,490.02

Finding the Fourth Proportional to 20,564.59, 28,378.61 and 11,490.02

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Solution

The fourth proportional to 20,564.59, 28,378.61 and 11,490.02 is: 15,855.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,564.59 : 28,378.61 = 11,490.02 : x
  2. Step 2: Convert to fraction form
    20,564.59/28,378.61 = 11,490.02/x
  3. Step 3: Cross multiply
    20,564.59x = 28,378.61 × 11,490.02
  4. Step 4: Simplify right side
    20,564.59x = 326,070,796.47
  5. Step 5: Solve for x
    x = 326,070,796.47/20,564.59
  6. Step 6: Final answer
    x = 15,855.93

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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.