Home / 20,756.25-28,674.81-13,603.14

Finding the Fourth Proportional to 20,756.25, 28,674.81 and 13,603.14

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Solution

The fourth proportional to 20,756.25, 28,674.81 and 13,603.14 is: 18,792.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.25 : 28,674.81 = 13,603.14 : x
  2. Step 2: Convert to fraction form
    20,756.25/28,674.81 = 13,603.14/x
  3. Step 3: Cross multiply
    20,756.25x = 28,674.81 × 13,603.14
  4. Step 4: Simplify right side
    20,756.25x = 390,067,454.90
  5. Step 5: Solve for x
    x = 390,067,454.90/20,756.25
  6. Step 6: Final answer
    x = 18,792.77

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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.