Home / 28,512.74-39,346.41-15,765.12

Finding the Fourth Proportional to 28,512.74, 39,346.41 and 15,765.12

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Solution

The fourth proportional to 28,512.74, 39,346.41 and 15,765.12 is: 21,755.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512.74 : 39,346.41 = 15,765.12 : x
  2. Step 2: Convert to fraction form
    28,512.74/39,346.41 = 15,765.12/x
  3. Step 3: Cross multiply
    28,512.74x = 39,346.41 × 15,765.12
  4. Step 4: Simplify right side
    28,512.74x = 620,300,875.22
  5. Step 5: Solve for x
    x = 620,300,875.22/28,512.74
  6. Step 6: Final answer
    x = 21,755.22

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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.