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Finding the Fourth Proportional to 9,239.66, 12,750.72 and 4,990.72

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Solution

The fourth proportional to 9,239.66, 12,750.72 and 4,990.72 is: 6,887.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,239.66 : 12,750.72 = 4,990.72 : x
  2. Step 2: Convert to fraction form
    9,239.66/12,750.72 = 4,990.72/x
  3. Step 3: Cross multiply
    9,239.66x = 12,750.72 × 4,990.72
  4. Step 4: Simplify right side
    9,239.66x = 63,635,273.32
  5. Step 5: Solve for x
    x = 63,635,273.32/9,239.66
  6. Step 6: Final answer
    x = 6,887.19

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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.