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Finding the Fourth Proportional to 13,888.80, 20,808.93 and 11,563.74

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Solution

The fourth proportional to 13,888.80, 20,808.93 and 11,563.74 is: 17,325.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,888.80 : 20,808.93 = 11,563.74 : x
  2. Step 2: Convert to fraction form
    13,888.80/20,808.93 = 11,563.74/x
  3. Step 3: Cross multiply
    13,888.80x = 20,808.93 × 11,563.74
  4. Step 4: Simplify right side
    13,888.80x = 240,629,056.20
  5. Step 5: Solve for x
    x = 240,629,056.20/13,888.80
  6. Step 6: Final answer
    x = 17,325.40

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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.