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Finding the Fourth Proportional to 13,505.61, 20,252.13 and 4,143.22

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Solution

The fourth proportional to 13,505.61, 20,252.13 and 4,143.22 is: 6,212.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,505.61 : 20,252.13 = 4,143.22 : x
  2. Step 2: Convert to fraction form
    13,505.61/20,252.13 = 4,143.22/x
  3. Step 3: Cross multiply
    13,505.61x = 20,252.13 × 4,143.22
  4. Step 4: Simplify right side
    13,505.61x = 83,909,030.06
  5. Step 5: Solve for x
    x = 83,909,030.06/13,505.61
  6. Step 6: Final answer
    x = 6,212.90

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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.