Home / 28,137.28-38,826.84-15,561.76

Finding the Fourth Proportional to 28,137.28, 38,826.84 and 15,561.76

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Solution

The fourth proportional to 28,137.28, 38,826.84 and 15,561.76 is: 21,473.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,137.28 : 38,826.84 = 15,561.76 : x
  2. Step 2: Convert to fraction form
    28,137.28/38,826.84 = 15,561.76/x
  3. Step 3: Cross multiply
    28,137.28x = 38,826.84 × 15,561.76
  4. Step 4: Simplify right side
    28,137.28x = 604,213,965.64
  5. Step 5: Solve for x
    x = 604,213,965.64/28,137.28
  6. Step 6: Final answer
    x = 21,473.79

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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.