Home / 15,813.90-21,822.87-8,740.62

Finding the Fourth Proportional to 15,813.90, 21,822.87 and 8,740.62

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Solution

The fourth proportional to 15,813.90, 21,822.87 and 8,740.62 is: 12,061.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,813.90 : 21,822.87 = 8,740.62 : x
  2. Step 2: Convert to fraction form
    15,813.90/21,822.87 = 8,740.62/x
  3. Step 3: Cross multiply
    15,813.90x = 21,822.87 × 8,740.62
  4. Step 4: Simplify right side
    15,813.90x = 190,745,413.98
  5. Step 5: Solve for x
    x = 190,745,413.98/15,813.90
  6. Step 6: Final answer
    x = 12,061.88

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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.