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Finding the Fourth Proportional to 13,655.70, 19,143.90 and 13,655.70

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Solution

The fourth proportional to 13,655.70, 19,143.90 and 13,655.70 is: 19,143.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,655.70 : 19,143.90 = 13,655.70 : x
  2. Step 2: Convert to fraction form
    13,655.70/19,143.90 = 13,655.70/x
  3. Step 3: Cross multiply
    13,655.70x = 19,143.90 × 13,655.70
  4. Step 4: Simplify right side
    13,655.70x = 261,423,355.23
  5. Step 5: Solve for x
    x = 261,423,355.23/13,655.70
  6. Step 6: Final answer
    x = 19,143.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.