Home / 21,413.45-29,547.29-12,215.09

Finding the Fourth Proportional to 21,413.45, 29,547.29 and 12,215.09

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Solution

The fourth proportional to 21,413.45, 29,547.29 and 12,215.09 is: 16,854.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,413.45 : 29,547.29 = 12,215.09 : x
  2. Step 2: Convert to fraction form
    21,413.45/29,547.29 = 12,215.09/x
  3. Step 3: Cross multiply
    21,413.45x = 29,547.29 × 12,215.09
  4. Step 4: Simplify right side
    21,413.45x = 360,922,597.79
  5. Step 5: Solve for x
    x = 360,922,597.79/21,413.45
  6. Step 6: Final answer
    x = 16,854.95

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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.