Home / 12,920.79-19,413.63-8,242.95

Finding the Fourth Proportional to 12,920.79, 19,413.63 and 8,242.95

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Solution

The fourth proportional to 12,920.79, 19,413.63 and 8,242.95 is: 12,385.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920.79 : 19,413.63 = 8,242.95 : x
  2. Step 2: Convert to fraction form
    12,920.79/19,413.63 = 8,242.95/x
  3. Step 3: Cross multiply
    12,920.79x = 19,413.63 × 8,242.95
  4. Step 4: Simplify right side
    12,920.79x = 160,025,581.41
  5. Step 5: Solve for x
    x = 160,025,581.41/12,920.79
  6. Step 6: Final answer
    x = 12,385.12

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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.