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Finding the Fourth Proportional to 13,328.88, 19,967.88 and 7,467.76

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Solution

The fourth proportional to 13,328.88, 19,967.88 and 7,467.76 is: 11,187.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,328.88 : 19,967.88 = 7,467.76 : x
  2. Step 2: Convert to fraction form
    13,328.88/19,967.88 = 7,467.76/x
  3. Step 3: Cross multiply
    13,328.88x = 19,967.88 × 7,467.76
  4. Step 4: Simplify right side
    13,328.88x = 149,115,335.55
  5. Step 5: Solve for x
    x = 149,115,335.55/13,328.88
  6. Step 6: Final answer
    x = 11,187.39

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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.