Home / 28,275.78-42,413.40-17,185.53

Finding the Fourth Proportional to 28,275.78, 42,413.40 and 17,185.53

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Solution

The fourth proportional to 28,275.78, 42,413.40 and 17,185.53 is: 25,778.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,275.78 : 42,413.40 = 17,185.53 : x
  2. Step 2: Convert to fraction form
    28,275.78/42,413.40 = 17,185.53/x
  3. Step 3: Cross multiply
    28,275.78x = 42,413.40 × 17,185.53
  4. Step 4: Simplify right side
    28,275.78x = 728,896,758.10
  5. Step 5: Solve for x
    x = 728,896,758.10/28,275.78
  6. Step 6: Final answer
    x = 25,778.13

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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.