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Finding the Fourth Proportional to 18,653.05, 25,711.05 and 14,612.91

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Solution

The fourth proportional to 18,653.05, 25,711.05 and 14,612.91 is: 20,142.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,653.05 : 25,711.05 = 14,612.91 : x
  2. Step 2: Convert to fraction form
    18,653.05/25,711.05 = 14,612.91/x
  3. Step 3: Cross multiply
    18,653.05x = 25,711.05 × 14,612.91
  4. Step 4: Simplify right side
    18,653.05x = 375,713,259.66
  5. Step 5: Solve for x
    x = 375,713,259.66/18,653.05
  6. Step 6: Final answer
    x = 20,142.19

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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.