Home / 14,606.78-20,156.19-8,638.70

Finding the Fourth Proportional to 14,606.78, 20,156.19 and 8,638.70

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Solution

The fourth proportional to 14,606.78, 20,156.19 and 8,638.70 is: 11,920.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,606.78 : 20,156.19 = 8,638.70 : x
  2. Step 2: Convert to fraction form
    14,606.78/20,156.19 = 8,638.70/x
  3. Step 3: Cross multiply
    14,606.78x = 20,156.19 × 8,638.70
  4. Step 4: Simplify right side
    14,606.78x = 174,123,278.55
  5. Step 5: Solve for x
    x = 174,123,278.55/14,606.78
  6. Step 6: Final answer
    x = 11,920.72

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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.