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Finding the Fourth Proportional to 10,703.87, 14,785.46 and 8,216.72

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Solution

The fourth proportional to 10,703.87, 14,785.46 and 8,216.72 is: 11,349.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,703.87 : 14,785.46 = 8,216.72 : x
  2. Step 2: Convert to fraction form
    10,703.87/14,785.46 = 8,216.72/x
  3. Step 3: Cross multiply
    10,703.87x = 14,785.46 × 8,216.72
  4. Step 4: Simplify right side
    10,703.87x = 121,487,937.66
  5. Step 5: Solve for x
    x = 121,487,937.66/10,703.87
  6. Step 6: Final answer
    x = 11,349.91

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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.