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Finding the Fourth Proportional to 9,898.74, 13,655.30 and 5,918.80

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Solution

The fourth proportional to 9,898.74, 13,655.30 and 5,918.80 is: 8,164.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,898.74 : 13,655.30 = 5,918.80 : x
  2. Step 2: Convert to fraction form
    9,898.74/13,655.30 = 5,918.80/x
  3. Step 3: Cross multiply
    9,898.74x = 13,655.30 × 5,918.80
  4. Step 4: Simplify right side
    9,898.74x = 80,822,989.64
  5. Step 5: Solve for x
    x = 80,822,989.64/9,898.74
  6. Step 6: Final answer
    x = 8,164.98

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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.