Home / 20,395.11-28,155.14-13,678.28

Finding the Fourth Proportional to 20,395.11, 28,155.14 and 13,678.28

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Solution

The fourth proportional to 20,395.11, 28,155.14 and 13,678.28 is: 18,882.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,395.11 : 28,155.14 = 13,678.28 : x
  2. Step 2: Convert to fraction form
    20,395.11/28,155.14 = 13,678.28/x
  3. Step 3: Cross multiply
    20,395.11x = 28,155.14 × 13,678.28
  4. Step 4: Simplify right side
    20,395.11x = 385,113,888.36
  5. Step 5: Solve for x
    x = 385,113,888.36/20,395.11
  6. Step 6: Final answer
    x = 18,882.66

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1.5x scale

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.