Home / 15,129.24-20,875.82-8,413.98

Finding the Fourth Proportional to 15,129.24, 20,875.82 and 8,413.98

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Solution

The fourth proportional to 15,129.24, 20,875.82 and 8,413.98 is: 11,609.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.24 : 20,875.82 = 8,413.98 : x
  2. Step 2: Convert to fraction form
    15,129.24/20,875.82 = 8,413.98/x
  3. Step 3: Cross multiply
    15,129.24x = 20,875.82 × 8,413.98
  4. Step 4: Simplify right side
    15,129.24x = 175,648,731.96
  5. Step 5: Solve for x
    x = 175,648,731.96/15,129.24
  6. Step 6: Final answer
    x = 11,609.88

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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.