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Finding the Fourth Proportional to 14,653.31, 20,221.53 and 7,939.10

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Solution

The fourth proportional to 14,653.31, 20,221.53 and 7,939.10 is: 10,955.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,653.31 : 20,221.53 = 7,939.10 : x
  2. Step 2: Convert to fraction form
    14,653.31/20,221.53 = 7,939.10/x
  3. Step 3: Cross multiply
    14,653.31x = 20,221.53 × 7,939.10
  4. Step 4: Simplify right side
    14,653.31x = 160,540,748.82
  5. Step 5: Solve for x
    x = 160,540,748.82/14,653.31
  6. Step 6: Final answer
    x = 10,955.94

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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.