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Finding the Fourth Proportional to 13,596.90, 20,384.55 and 7,440.90

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Solution

The fourth proportional to 13,596.90, 20,384.55 and 7,440.90 is: 11,155.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,596.90 : 20,384.55 = 7,440.90 : x
  2. Step 2: Convert to fraction form
    13,596.90/20,384.55 = 7,440.90/x
  3. Step 3: Cross multiply
    13,596.90x = 20,384.55 × 7,440.90
  4. Step 4: Simplify right side
    13,596.90x = 151,679,398.10
  5. Step 5: Solve for x
    x = 151,679,398.10/13,596.90
  6. Step 6: Final answer
    x = 11,155.44

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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.