Home / 28,886.28-39,863.16-15,638.28

Finding the Fourth Proportional to 28,886.28, 39,863.16 and 15,638.28

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Solution

The fourth proportional to 28,886.28, 39,863.16 and 15,638.28 is: 21,580.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,886.28 : 39,863.16 = 15,638.28 : x
  2. Step 2: Convert to fraction form
    28,886.28/39,863.16 = 15,638.28/x
  3. Step 3: Cross multiply
    28,886.28x = 39,863.16 × 15,638.28
  4. Step 4: Simplify right side
    28,886.28x = 623,391,257.76
  5. Step 5: Solve for x
    x = 623,391,257.76/28,886.28
  6. Step 6: Final answer
    x = 21,580.88

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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.