Home / 28,236.45-38,965.71-15,661.20

Finding the Fourth Proportional to 28,236.45, 38,965.71 and 15,661.20

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Solution

The fourth proportional to 28,236.45, 38,965.71 and 15,661.20 is: 21,612.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,236.45 : 38,965.71 = 15,661.20 : x
  2. Step 2: Convert to fraction form
    28,236.45/38,965.71 = 15,661.20/x
  3. Step 3: Cross multiply
    28,236.45x = 38,965.71 × 15,661.20
  4. Step 4: Simplify right side
    28,236.45x = 610,249,777.45
  5. Step 5: Solve for x
    x = 610,249,777.45/28,236.45
  6. Step 6: Final answer
    x = 21,612.13

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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.