Home / 28,405.62-39,199.95-15,831.18

Finding the Fourth Proportional to 28,405.62, 39,199.95 and 15,831.18

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Solution

The fourth proportional to 28,405.62, 39,199.95 and 15,831.18 is: 21,847.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,405.62 : 39,199.95 = 15,831.18 : x
  2. Step 2: Convert to fraction form
    28,405.62/39,199.95 = 15,831.18/x
  3. Step 3: Cross multiply
    28,405.62x = 39,199.95 × 15,831.18
  4. Step 4: Simplify right side
    28,405.62x = 620,581,464.44
  5. Step 5: Solve for x
    x = 620,581,464.44/28,405.62
  6. Step 6: Final answer
    x = 21,847.14

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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.