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Finding the Fourth Proportional to 6,434.10, 8,879.15 and 3,916.32

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Solution

The fourth proportional to 6,434.10, 8,879.15 and 3,916.32 is: 5,404.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,434.10 : 8,879.15 = 3,916.32 : x
  2. Step 2: Convert to fraction form
    6,434.10/8,879.15 = 3,916.32/x
  3. Step 3: Cross multiply
    6,434.10x = 8,879.15 × 3,916.32
  4. Step 4: Simplify right side
    6,434.10x = 34,773,569.22
  5. Step 5: Solve for x
    x = 34,773,569.22/6,434.10
  6. Step 6: Final answer
    x = 5,404.57

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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.