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Finding the Fourth Proportional to 13,189.80, 19,784.70 and 10,252.20

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Solution

The fourth proportional to 13,189.80, 19,784.70 and 10,252.20 is: 15,378.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.80 : 19,784.70 = 10,252.20 : x
  2. Step 2: Convert to fraction form
    13,189.80/19,784.70 = 10,252.20/x
  3. Step 3: Cross multiply
    13,189.80x = 19,784.70 × 10,252.20
  4. Step 4: Simplify right side
    13,189.80x = 202,836,701.34
  5. Step 5: Solve for x
    x = 202,836,701.34/13,189.80
  6. Step 6: Final answer
    x = 15,378.30

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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.