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Finding the Fourth Proportional to 14,653.11, 20,221.29 and 7,938.76

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Solution

The fourth proportional to 14,653.11, 20,221.29 and 7,938.76 is: 10,955.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,653.11 : 20,221.29 = 7,938.76 : x
  2. Step 2: Convert to fraction form
    14,653.11/20,221.29 = 7,938.76/x
  3. Step 3: Cross multiply
    14,653.11x = 20,221.29 × 7,938.76
  4. Step 4: Simplify right side
    14,653.11x = 160,531,968.20
  5. Step 5: Solve for x
    x = 160,531,968.20/14,653.11
  6. Step 6: Final answer
    x = 10,955.49

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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.