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Finding the Fourth Proportional to 14,653.15, 20,221.31 and 7,938.95

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Solution

The fourth proportional to 14,653.15, 20,221.31 and 7,938.95 is: 10,955.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,653.15 : 20,221.31 = 7,938.95 : x
  2. Step 2: Convert to fraction form
    14,653.15/20,221.31 = 7,938.95/x
  3. Step 3: Cross multiply
    14,653.15x = 20,221.31 × 7,938.95
  4. Step 4: Simplify right side
    14,653.15x = 160,536,019.58
  5. Step 5: Solve for x
    x = 160,536,019.58/14,653.15
  6. Step 6: Final answer
    x = 10,955.74

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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.