Home / 28,379.50-39,163.32-15,632.40

Finding the Fourth Proportional to 28,379.50, 39,163.32 and 15,632.40

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Solution

The fourth proportional to 28,379.50, 39,163.32 and 15,632.40 is: 21,572.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,379.50 : 39,163.32 = 15,632.40 : x
  2. Step 2: Convert to fraction form
    28,379.50/39,163.32 = 15,632.40/x
  3. Step 3: Cross multiply
    28,379.50x = 39,163.32 × 15,632.40
  4. Step 4: Simplify right side
    28,379.50x = 612,216,683.57
  5. Step 5: Solve for x
    x = 612,216,683.57/28,379.50
  6. Step 6: Final answer
    x = 21,572.50

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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.