Home / 20,399.47-28,154.07-11,447.50

Finding the Fourth Proportional to 20,399.47, 28,154.07 and 11,447.50

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Solution

The fourth proportional to 20,399.47, 28,154.07 and 11,447.50 is: 15,799.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,399.47 : 28,154.07 = 11,447.50 : x
  2. Step 2: Convert to fraction form
    20,399.47/28,154.07 = 11,447.50/x
  3. Step 3: Cross multiply
    20,399.47x = 28,154.07 × 11,447.50
  4. Step 4: Simplify right side
    20,399.47x = 322,293,518.32
  5. Step 5: Solve for x
    x = 322,293,518.32/20,399.47
  6. Step 6: Final answer
    x = 15,799.12

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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.