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Finding the Fourth Proportional to 13,388.17, 20,061.91 and 10,603.21

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Solution

The fourth proportional to 13,388.17, 20,061.91 and 10,603.21 is: 15,888.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,388.17 : 20,061.91 = 10,603.21 : x
  2. Step 2: Convert to fraction form
    13,388.17/20,061.91 = 10,603.21/x
  3. Step 3: Cross multiply
    13,388.17x = 20,061.91 × 10,603.21
  4. Step 4: Simplify right side
    13,388.17x = 212,720,644.73
  5. Step 5: Solve for x
    x = 212,720,644.73/13,388.17
  6. Step 6: Final answer
    x = 15,888.70

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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.