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Finding the Fourth Proportional to 8,390.95, 11,580.64 and 4,854.39

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Solution

The fourth proportional to 8,390.95, 11,580.64 and 4,854.39 is: 6,699.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.95 : 11,580.64 = 4,854.39 : x
  2. Step 2: Convert to fraction form
    8,390.95/11,580.64 = 4,854.39/x
  3. Step 3: Cross multiply
    8,390.95x = 11,580.64 × 4,854.39
  4. Step 4: Simplify right side
    8,390.95x = 56,216,930.87
  5. Step 5: Solve for x
    x = 56,216,930.87/8,390.95
  6. Step 6: Final answer
    x = 6,699.71

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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.