Home / 15,128.77-20,875.16-8,413.50

Finding the Fourth Proportional to 15,128.77, 20,875.16 and 8,413.50

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Solution

The fourth proportional to 15,128.77, 20,875.16 and 8,413.50 is: 11,609.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.77 : 20,875.16 = 8,413.50 : x
  2. Step 2: Convert to fraction form
    15,128.77/20,875.16 = 8,413.50/x
  3. Step 3: Cross multiply
    15,128.77x = 20,875.16 × 8,413.50
  4. Step 4: Simplify right side
    15,128.77x = 175,633,179.69
  5. Step 5: Solve for x
    x = 175,633,179.69/15,128.77
  6. Step 6: Final answer
    x = 11,609.22

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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.