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Finding the Fourth Proportional to 17,605.76, 26,413.04 and 12,421.76

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Solution

The fourth proportional to 17,605.76, 26,413.04 and 12,421.76 is: 18,635.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,605.76 : 26,413.04 = 12,421.76 : x
  2. Step 2: Convert to fraction form
    17,605.76/26,413.04 = 12,421.76/x
  3. Step 3: Cross multiply
    17,605.76x = 26,413.04 × 12,421.76
  4. Step 4: Simplify right side
    17,605.76x = 328,096,443.75
  5. Step 5: Solve for x
    x = 328,096,443.75/17,605.76
  6. Step 6: Final answer
    x = 18,635.74

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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.