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Finding the Fourth Proportional to 14,635.61, 20,197.13 and 7,921.28

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Solution

The fourth proportional to 14,635.61, 20,197.13 and 7,921.28 is: 10,931.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,635.61 : 20,197.13 = 7,921.28 : x
  2. Step 2: Convert to fraction form
    14,635.61/20,197.13 = 7,921.28/x
  3. Step 3: Cross multiply
    14,635.61x = 20,197.13 × 7,921.28
  4. Step 4: Simplify right side
    14,635.61x = 159,987,192.22
  5. Step 5: Solve for x
    x = 159,987,192.22/14,635.61
  6. Step 6: Final answer
    x = 10,931.37

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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.