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Finding the Fourth Proportional to 13,390.88, 20,068.88 and 7,467.52

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Solution

The fourth proportional to 13,390.88, 20,068.88 and 7,467.52 is: 11,191.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.88 : 20,068.88 = 7,467.52 : x
  2. Step 2: Convert to fraction form
    13,390.88/20,068.88 = 7,467.52/x
  3. Step 3: Cross multiply
    13,390.88x = 20,068.88 × 7,467.52
  4. Step 4: Simplify right side
    13,390.88x = 149,864,762.78
  5. Step 5: Solve for x
    x = 149,864,762.78/13,390.88
  6. Step 6: Final answer
    x = 11,191.55

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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.