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Finding the Fourth Proportional to 6,411.90, 9,607.05 and 3,117.90

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Solution

The fourth proportional to 6,411.90, 9,607.05 and 3,117.90 is: 4,671.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,411.90 : 9,607.05 = 3,117.90 : x
  2. Step 2: Convert to fraction form
    6,411.90/9,607.05 = 3,117.90/x
  3. Step 3: Cross multiply
    6,411.90x = 9,607.05 × 3,117.90
  4. Step 4: Simplify right side
    6,411.90x = 29,953,821.20
  5. Step 5: Solve for x
    x = 29,953,821.20/6,411.90
  6. Step 6: Final answer
    x = 4,671.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.