Home / 15,728.09-21,681.28-10,413.68

Finding the Fourth Proportional to 15,728.09, 21,681.28 and 10,413.68

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Solution

The fourth proportional to 15,728.09, 21,681.28 and 10,413.68 is: 14,355.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,728.09 : 21,681.28 = 10,413.68 : x
  2. Step 2: Convert to fraction form
    15,728.09/21,681.28 = 10,413.68/x
  3. Step 3: Cross multiply
    15,728.09x = 21,681.28 × 10,413.68
  4. Step 4: Simplify right side
    15,728.09x = 225,781,911.91
  5. Step 5: Solve for x
    x = 225,781,911.91/15,728.09
  6. Step 6: Final answer
    x = 14,355.33

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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.