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Finding the Fourth Proportional to 13,918.17, 20,753.10 and 12,372.69

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Solution

The fourth proportional to 13,918.17, 20,753.10 and 12,372.69 is: 18,448.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,918.17 : 20,753.10 = 12,372.69 : x
  2. Step 2: Convert to fraction form
    13,918.17/20,753.10 = 12,372.69/x
  3. Step 3: Cross multiply
    13,918.17x = 20,753.10 × 12,372.69
  4. Step 4: Simplify right side
    13,918.17x = 256,771,672.84
  5. Step 5: Solve for x
    x = 256,771,672.84/13,918.17
  6. Step 6: Final answer
    x = 18,448.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.