Home / 20,860.40-28,796.64-13,316.69

Finding the Fourth Proportional to 20,860.40, 28,796.64 and 13,316.69

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Solution

The fourth proportional to 20,860.40, 28,796.64 and 13,316.69 is: 18,382.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.40 : 28,796.64 = 13,316.69 : x
  2. Step 2: Convert to fraction form
    20,860.40/28,796.64 = 13,316.69/x
  3. Step 3: Cross multiply
    20,860.40x = 28,796.64 × 13,316.69
  4. Step 4: Simplify right side
    20,860.40x = 383,475,927.92
  5. Step 5: Solve for x
    x = 383,475,927.92/20,860.40
  6. Step 6: Final answer
    x = 18,382.96

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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.