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Finding the Fourth Proportional to 9,898.86, 13,655.48 and 5,918.92

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Solution

The fourth proportional to 9,898.86, 13,655.48 and 5,918.92 is: 8,165.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,898.86 : 13,655.48 = 5,918.92 : x
  2. Step 2: Convert to fraction form
    9,898.86/13,655.48 = 5,918.92/x
  3. Step 3: Cross multiply
    9,898.86x = 13,655.48 × 5,918.92
  4. Step 4: Simplify right side
    9,898.86x = 80,825,693.68
  5. Step 5: Solve for x
    x = 80,825,693.68/9,898.86
  6. Step 6: Final answer
    x = 8,165.15

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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.