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Finding the Fourth Proportional to 51,098.40, 76,647.60 and 13,658.40

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Solution

The fourth proportional to 51,098.40, 76,647.60 and 13,658.40 is: 20,487.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,098.40 : 76,647.60 = 13,658.40 : x
  2. Step 2: Convert to fraction form
    51,098.40/76,647.60 = 13,658.40/x
  3. Step 3: Cross multiply
    51,098.40x = 76,647.60 × 13,658.40
  4. Step 4: Simplify right side
    51,098.40x = 1,046,883,579.84
  5. Step 5: Solve for x
    x = 1,046,883,579.84/51,098.40
  6. Step 6: Final answer
    x = 20,487.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.