Home / 31,918.95-47,874.74-8,547.21

Finding the Fourth Proportional to 31,918.95, 47,874.74 and 8,547.21

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Solution

The fourth proportional to 31,918.95, 47,874.74 and 8,547.21 is: 12,819.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,918.95 : 47,874.74 = 8,547.21 : x
  2. Step 2: Convert to fraction form
    31,918.95/47,874.74 = 8,547.21/x
  3. Step 3: Cross multiply
    31,918.95x = 47,874.74 × 8,547.21
  4. Step 4: Simplify right side
    31,918.95x = 409,195,413.74
  5. Step 5: Solve for x
    x = 409,195,413.74/31,918.95
  6. Step 6: Final answer
    x = 12,819.83

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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.