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Finding the Fourth Proportional to 13,407.99, 20,104.16 and 4,045.20

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Solution

The fourth proportional to 13,407.99, 20,104.16 and 4,045.20 is: 6,065.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,407.99 : 20,104.16 = 4,045.20 : x
  2. Step 2: Convert to fraction form
    13,407.99/20,104.16 = 4,045.20/x
  3. Step 3: Cross multiply
    13,407.99x = 20,104.16 × 4,045.20
  4. Step 4: Simplify right side
    13,407.99x = 81,325,327.81
  5. Step 5: Solve for x
    x = 81,325,327.81/13,407.99
  6. Step 6: Final answer
    x = 6,065.44

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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.