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Finding the Fourth Proportional to 13,750.40, 20,601.30 and 12,195.20

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Solution

The fourth proportional to 13,750.40, 20,601.30 and 12,195.20 is: 18,271.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,750.40 : 20,601.30 = 12,195.20 : x
  2. Step 2: Convert to fraction form
    13,750.40/20,601.30 = 12,195.20/x
  3. Step 3: Cross multiply
    13,750.40x = 20,601.30 × 12,195.20
  4. Step 4: Simplify right side
    13,750.40x = 251,236,973.76
  5. Step 5: Solve for x
    x = 251,236,973.76/13,750.40
  6. Step 6: Final answer
    x = 18,271.25

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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.