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Finding the Fourth Proportional to 13,572.72, 18,729.28 and 7,603.04

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Solution

The fourth proportional to 13,572.72, 18,729.28 and 7,603.04 is: 10,491.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,572.72 : 18,729.28 = 7,603.04 : x
  2. Step 2: Convert to fraction form
    13,572.72/18,729.28 = 7,603.04/x
  3. Step 3: Cross multiply
    13,572.72x = 18,729.28 × 7,603.04
  4. Step 4: Simplify right side
    13,572.72x = 142,399,465.01
  5. Step 5: Solve for x
    x = 142,399,465.01/13,572.72
  6. Step 6: Final answer
    x = 10,491.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.