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Finding the Fourth Proportional to 8,460.68, 11,672.87 and 4,920.98

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Solution

The fourth proportional to 8,460.68, 11,672.87 and 4,920.98 is: 6,789.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,460.68 : 11,672.87 = 4,920.98 : x
  2. Step 2: Convert to fraction form
    8,460.68/11,672.87 = 4,920.98/x
  3. Step 3: Cross multiply
    8,460.68x = 11,672.87 × 4,920.98
  4. Step 4: Simplify right side
    8,460.68x = 57,441,959.81
  5. Step 5: Solve for x
    x = 57,441,959.81/8,460.68
  6. Step 6: Final answer
    x = 6,789.28

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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.