Home / 20,577.64-28,413.18-15,789.94

Finding the Fourth Proportional to 20,577.64, 28,413.18 and 15,789.94

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Solution

The fourth proportional to 20,577.64, 28,413.18 and 15,789.94 is: 21,802.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,577.64 : 28,413.18 = 15,789.94 : x
  2. Step 2: Convert to fraction form
    20,577.64/28,413.18 = 15,789.94/x
  3. Step 3: Cross multiply
    20,577.64x = 28,413.18 × 15,789.94
  4. Step 4: Simplify right side
    20,577.64x = 448,642,407.41
  5. Step 5: Solve for x
    x = 448,642,407.41/20,577.64
  6. Step 6: Final answer
    x = 21,802.42

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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.