Home / 20,405.08-28,163.40-15,572.36

Finding the Fourth Proportional to 20,405.08, 28,163.40 and 15,572.36

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Solution

The fourth proportional to 20,405.08, 28,163.40 and 15,572.36 is: 21,493.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.08 : 28,163.40 = 15,572.36 : x
  2. Step 2: Convert to fraction form
    20,405.08/28,163.40 = 15,572.36/x
  3. Step 3: Cross multiply
    20,405.08x = 28,163.40 × 15,572.36
  4. Step 4: Simplify right side
    20,405.08x = 438,570,603.62
  5. Step 5: Solve for x
    x = 438,570,603.62/20,405.08
  6. Step 6: Final answer
    x = 21,493.21

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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.