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Finding the Fourth Proportional to 14,643.55, 20,208.04 and 7,929.12

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Solution

The fourth proportional to 14,643.55, 20,208.04 and 7,929.12 is: 10,942.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,643.55 : 20,208.04 = 7,929.12 : x
  2. Step 2: Convert to fraction form
    14,643.55/20,208.04 = 7,929.12/x
  3. Step 3: Cross multiply
    14,643.55x = 20,208.04 × 7,929.12
  4. Step 4: Simplify right side
    14,643.55x = 160,231,954.30
  5. Step 5: Solve for x
    x = 160,231,954.30/14,643.55
  6. Step 6: Final answer
    x = 10,942.15

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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.