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Finding the Fourth Proportional to 14,653.28, 20,221.49 and 7,939.07

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Solution

The fourth proportional to 14,653.28, 20,221.49 and 7,939.07 is: 10,955.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,653.28 : 20,221.49 = 7,939.07 : x
  2. Step 2: Convert to fraction form
    14,653.28/20,221.49 = 7,939.07/x
  3. Step 3: Cross multiply
    14,653.28x = 20,221.49 × 7,939.07
  4. Step 4: Simplify right side
    14,653.28x = 160,539,895.02
  5. Step 5: Solve for x
    x = 160,539,895.02/14,653.28
  6. Step 6: Final answer
    x = 10,955.91

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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.