Home / 28,347.12-39,119.16-15,771.84

Finding the Fourth Proportional to 28,347.12, 39,119.16 and 15,771.84

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Solution

The fourth proportional to 28,347.12, 39,119.16 and 15,771.84 is: 21,765.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,347.12 : 39,119.16 = 15,771.84 : x
  2. Step 2: Convert to fraction form
    28,347.12/39,119.16 = 15,771.84/x
  3. Step 3: Cross multiply
    28,347.12x = 39,119.16 × 15,771.84
  4. Step 4: Simplify right side
    28,347.12x = 616,981,132.45
  5. Step 5: Solve for x
    x = 616,981,132.45/28,347.12
  6. Step 6: Final answer
    x = 21,765.21

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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.