Home / 28,413.43-39,210.21-15,667.72

Finding the Fourth Proportional to 28,413.43, 39,210.21 and 15,667.72

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Solution

The fourth proportional to 28,413.43, 39,210.21 and 15,667.72 is: 21,621.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,413.43 : 39,210.21 = 15,667.72 : x
  2. Step 2: Convert to fraction form
    28,413.43/39,210.21 = 15,667.72/x
  3. Step 3: Cross multiply
    28,413.43x = 39,210.21 × 15,667.72
  4. Step 4: Simplify right side
    28,413.43x = 614,334,835.19
  5. Step 5: Solve for x
    x = 614,334,835.19/28,413.43
  6. Step 6: Final answer
    x = 21,621.28

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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.