Home / 21,007.40-31,511.09-14,413.59

Finding the Fourth Proportional to 21,007.40, 31,511.09 and 14,413.59

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Solution

The fourth proportional to 21,007.40, 31,511.09 and 14,413.59 is: 21,620.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.40 : 31,511.09 = 14,413.59 : x
  2. Step 2: Convert to fraction form
    21,007.40/31,511.09 = 14,413.59/x
  3. Step 3: Cross multiply
    21,007.40x = 31,511.09 × 14,413.59
  4. Step 4: Simplify right side
    21,007.40x = 454,187,967.75
  5. Step 5: Solve for x
    x = 454,187,967.75/21,007.40
  6. Step 6: Final answer
    x = 21,620.39

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Similar ratio
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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.