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Finding the Fourth Proportional to 19,667.68, 29,476.88 and 15,491.20

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Solution

The fourth proportional to 19,667.68, 29,476.88 and 15,491.20 is: 23,217.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,667.68 : 29,476.88 = 15,491.20 : x
  2. Step 2: Convert to fraction form
    19,667.68/29,476.88 = 15,491.20/x
  3. Step 3: Cross multiply
    19,667.68x = 29,476.88 × 15,491.20
  4. Step 4: Simplify right side
    19,667.68x = 456,632,243.46
  5. Step 5: Solve for x
    x = 456,632,243.46/19,667.68
  6. Step 6: Final answer
    x = 23,217.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.