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Finding the Fourth Proportional to 14,653.23, 20,221.46 and 7,938.90

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Solution

The fourth proportional to 14,653.23, 20,221.46 and 7,938.90 is: 10,955.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,653.23 : 20,221.46 = 7,938.90 : x
  2. Step 2: Convert to fraction form
    14,653.23/20,221.46 = 7,938.90/x
  3. Step 3: Cross multiply
    14,653.23x = 20,221.46 × 7,938.90
  4. Step 4: Simplify right side
    14,653.23x = 160,536,109.10
  5. Step 5: Solve for x
    x = 160,536,109.10/14,653.23
  6. Step 6: Final answer
    x = 10,955.68

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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.