Home / 28,347.38-39,119.40-15,772.12

Finding the Fourth Proportional to 28,347.38, 39,119.40 and 15,772.12

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Solution

The fourth proportional to 28,347.38, 39,119.40 and 15,772.12 is: 21,765.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,347.38 : 39,119.40 = 15,772.12 : x
  2. Step 2: Convert to fraction form
    28,347.38/39,119.40 = 15,772.12/x
  3. Step 3: Cross multiply
    28,347.38x = 39,119.40 × 15,772.12
  4. Step 4: Simplify right side
    28,347.38x = 616,995,871.13
  5. Step 5: Solve for x
    x = 616,995,871.13/28,347.38
  6. Step 6: Final answer
    x = 21,765.53

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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.