Home / 28,366.28-39,145.14-15,619.20

Finding the Fourth Proportional to 28,366.28, 39,145.14 and 15,619.20

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Solution

The fourth proportional to 28,366.28, 39,145.14 and 15,619.20 is: 21,554.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,366.28 : 39,145.14 = 15,619.20 : x
  2. Step 2: Convert to fraction form
    28,366.28/39,145.14 = 15,619.20/x
  3. Step 3: Cross multiply
    28,366.28x = 39,145.14 × 15,619.20
  4. Step 4: Simplify right side
    28,366.28x = 611,415,770.69
  5. Step 5: Solve for x
    x = 611,415,770.69/28,366.28
  6. Step 6: Final answer
    x = 21,554.31

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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.