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Finding the Fourth Proportional to 7,165.61, 9,879.12 and 4,923.35

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Solution

The fourth proportional to 7,165.61, 9,879.12 and 4,923.35 is: 6,787.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,165.61 : 9,879.12 = 4,923.35 : x
  2. Step 2: Convert to fraction form
    7,165.61/9,879.12 = 4,923.35/x
  3. Step 3: Cross multiply
    7,165.61x = 9,879.12 × 4,923.35
  4. Step 4: Simplify right side
    7,165.61x = 48,638,365.45
  5. Step 5: Solve for x
    x = 48,638,365.45/7,165.61
  6. Step 6: Final answer
    x = 6,787.75

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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.