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Finding the Fourth Proportional to 14,636.17, 20,197.74 and 7,921.64

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Solution

The fourth proportional to 14,636.17, 20,197.74 and 7,921.64 is: 10,931.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,636.17 : 20,197.74 = 7,921.64 : x
  2. Step 2: Convert to fraction form
    14,636.17/20,197.74 = 7,921.64/x
  3. Step 3: Cross multiply
    14,636.17x = 20,197.74 × 7,921.64
  4. Step 4: Simplify right side
    14,636.17x = 159,999,225.09
  5. Step 5: Solve for x
    x = 159,999,225.09/14,636.17
  6. Step 6: Final answer
    x = 10,931.77

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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.