Home / 28,186.64-38,900.20-15,613.84

Finding the Fourth Proportional to 28,186.64, 38,900.20 and 15,613.84

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Solution

The fourth proportional to 28,186.64, 38,900.20 and 15,613.84 is: 21,548.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,186.64 : 38,900.20 = 15,613.84 : x
  2. Step 2: Convert to fraction form
    28,186.64/38,900.20 = 15,613.84/x
  3. Step 3: Cross multiply
    28,186.64x = 38,900.20 × 15,613.84
  4. Step 4: Simplify right side
    28,186.64x = 607,381,498.77
  5. Step 5: Solve for x
    x = 607,381,498.77/28,186.64
  6. Step 6: Final answer
    x = 21,548.56

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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.