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Finding the Fourth Proportional to 13,663.70, 18,387.67 and 13,663.70

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Solution

The fourth proportional to 13,663.70, 18,387.67 and 13,663.70 is: 18,387.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,663.70 : 18,387.67 = 13,663.70 : x
  2. Step 2: Convert to fraction form
    13,663.70/18,387.67 = 13,663.70/x
  3. Step 3: Cross multiply
    13,663.70x = 18,387.67 × 13,663.70
  4. Step 4: Simplify right side
    13,663.70x = 251,243,606.58
  5. Step 5: Solve for x
    x = 251,243,606.58/13,663.70
  6. Step 6: Final answer
    x = 18,387.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.