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Finding the Fourth Proportional to 13,551.60, 18,698.94 and 7,808.16

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Solution

The fourth proportional to 13,551.60, 18,698.94 and 7,808.16 is: 10,773.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,551.60 : 18,698.94 = 7,808.16 : x
  2. Step 2: Convert to fraction form
    13,551.60/18,698.94 = 7,808.16/x
  3. Step 3: Cross multiply
    13,551.60x = 18,698.94 × 7,808.16
  4. Step 4: Simplify right side
    13,551.60x = 146,004,315.35
  5. Step 5: Solve for x
    x = 146,004,315.35/13,551.60
  6. Step 6: Final answer
    x = 10,773.95

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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.