Home / 20,281.68-27,989.80-11,329.36

Finding the Fourth Proportional to 20,281.68, 27,989.80 and 11,329.36

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Solution

The fourth proportional to 20,281.68, 27,989.80 and 11,329.36 is: 15,635.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.68 : 27,989.80 = 11,329.36 : x
  2. Step 2: Convert to fraction form
    20,281.68/27,989.80 = 11,329.36/x
  3. Step 3: Cross multiply
    20,281.68x = 27,989.80 × 11,329.36
  4. Step 4: Simplify right side
    20,281.68x = 317,106,520.53
  5. Step 5: Solve for x
    x = 317,106,520.53/20,281.68
  6. Step 6: Final answer
    x = 15,635.12

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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.