Home / 13,923.29-20,836.14-9,978.90

Finding the Fourth Proportional to 13,923.29, 20,836.14 and 9,978.90

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Solution

The fourth proportional to 13,923.29, 20,836.14 and 9,978.90 is: 14,933.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,923.29 : 20,836.14 = 9,978.90 : x
  2. Step 2: Convert to fraction form
    13,923.29/20,836.14 = 9,978.90/x
  3. Step 3: Cross multiply
    13,923.29x = 20,836.14 × 9,978.90
  4. Step 4: Simplify right side
    13,923.29x = 207,921,641.89
  5. Step 5: Solve for x
    x = 207,921,641.89/13,923.29
  6. Step 6: Final answer
    x = 14,933.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.