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Finding the Fourth Proportional to 15,775.77, 21,770.46 and 8,702.04

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Solution

The fourth proportional to 15,775.77, 21,770.46 and 8,702.04 is: 12,008.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,775.77 : 21,770.46 = 8,702.04 : x
  2. Step 2: Convert to fraction form
    15,775.77/21,770.46 = 8,702.04/x
  3. Step 3: Cross multiply
    15,775.77x = 21,770.46 × 8,702.04
  4. Step 4: Simplify right side
    15,775.77x = 189,447,413.74
  5. Step 5: Solve for x
    x = 189,447,413.74/15,775.77
  6. Step 6: Final answer
    x = 12,008.76

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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.