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Finding the Fourth Proportional to 14,948.70, 20,479.81 and 14,388.18

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Solution

The fourth proportional to 14,948.70, 20,479.81 and 14,388.18 is: 19,711.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,948.70 : 20,479.81 = 14,388.18 : x
  2. Step 2: Convert to fraction form
    14,948.70/20,479.81 = 14,388.18/x
  3. Step 3: Cross multiply
    14,948.70x = 20,479.81 × 14,388.18
  4. Step 4: Simplify right side
    14,948.70x = 294,667,192.65
  5. Step 5: Solve for x
    x = 294,667,192.65/14,948.70
  6. Step 6: Final answer
    x = 19,711.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.