Home / 28,388.88-39,181.32-15,817.68

Finding the Fourth Proportional to 28,388.88, 39,181.32 and 15,817.68

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Solution

The fourth proportional to 28,388.88, 39,181.32 and 15,817.68 is: 21,831.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,388.88 : 39,181.32 = 15,817.68 : x
  2. Step 2: Convert to fraction form
    28,388.88/39,181.32 = 15,817.68/x
  3. Step 3: Cross multiply
    28,388.88x = 39,181.32 × 15,817.68
  4. Step 4: Simplify right side
    28,388.88x = 619,757,581.74
  5. Step 5: Solve for x
    x = 619,757,581.74/28,388.88
  6. Step 6: Final answer
    x = 21,831.00

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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.