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Finding the Fourth Proportional to 13,572.88, 18,733.81 and 7,987.12

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Solution

The fourth proportional to 13,572.88, 18,733.81 and 7,987.12 is: 11,024.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,572.88 : 18,733.81 = 7,987.12 : x
  2. Step 2: Convert to fraction form
    13,572.88/18,733.81 = 7,987.12/x
  3. Step 3: Cross multiply
    13,572.88x = 18,733.81 × 7,987.12
  4. Step 4: Simplify right side
    13,572.88x = 149,629,188.53
  5. Step 5: Solve for x
    x = 149,629,188.53/13,572.88
  6. Step 6: Final answer
    x = 11,024.13

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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.