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Finding the Fourth Proportional to 8,458.70, 11,670.18 and 4,921.16

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Solution

The fourth proportional to 8,458.70, 11,670.18 and 4,921.16 is: 6,789.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,458.70 : 11,670.18 = 4,921.16 : x
  2. Step 2: Convert to fraction form
    8,458.70/11,670.18 = 4,921.16/x
  3. Step 3: Cross multiply
    8,458.70x = 11,670.18 × 4,921.16
  4. Step 4: Simplify right side
    8,458.70x = 57,430,823.01
  5. Step 5: Solve for x
    x = 57,430,823.01/8,458.70
  6. Step 6: Final answer
    x = 6,789.56

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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.