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Finding the Fourth Proportional to 13,602.99, 20,402.14 and 3,607.81

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Solution

The fourth proportional to 13,602.99, 20,402.14 and 3,607.81 is: 5,411.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,602.99 : 20,402.14 = 3,607.81 : x
  2. Step 2: Convert to fraction form
    13,602.99/20,402.14 = 3,607.81/x
  3. Step 3: Cross multiply
    13,602.99x = 20,402.14 × 3,607.81
  4. Step 4: Simplify right side
    13,602.99x = 73,607,044.71
  5. Step 5: Solve for x
    x = 73,607,044.71/13,602.99
  6. Step 6: Final answer
    x = 5,411.09

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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.