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Finding the Fourth Proportional to 6,389.95, 8,818.23 and 3,595.45

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Solution

The fourth proportional to 6,389.95, 8,818.23 and 3,595.45 is: 4,961.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,389.95 : 8,818.23 = 3,595.45 : x
  2. Step 2: Convert to fraction form
    6,389.95/8,818.23 = 3,595.45/x
  3. Step 3: Cross multiply
    6,389.95x = 8,818.23 × 3,595.45
  4. Step 4: Simplify right side
    6,389.95x = 31,705,505.05
  5. Step 5: Solve for x
    x = 31,705,505.05/6,389.95
  6. Step 6: Final answer
    x = 4,961.78

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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.