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Finding the Fourth Proportional to 13,457.40, 20,198.10 and 7,903.80

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Solution

The fourth proportional to 13,457.40, 20,198.10 and 7,903.80 is: 11,862.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,457.40 : 20,198.10 = 7,903.80 : x
  2. Step 2: Convert to fraction form
    13,457.40/20,198.10 = 7,903.80/x
  3. Step 3: Cross multiply
    13,457.40x = 20,198.10 × 7,903.80
  4. Step 4: Simplify right side
    13,457.40x = 159,641,742.78
  5. Step 5: Solve for x
    x = 159,641,742.78/13,457.40
  6. Step 6: Final answer
    x = 11,862.75

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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.