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Finding the Fourth Proportional to 14,711, 20,287.20 and 9,679.50

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Solution

The fourth proportional to 14,711, 20,287.20 and 9,679.50 is: 13,348.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,711 : 20,287.20 = 9,679.50 : x
  2. Step 2: Convert to fraction form
    14,711/20,287.20 = 9,679.50/x
  3. Step 3: Cross multiply
    14,711x = 20,287.20 × 9,679.50
  4. Step 4: Simplify right side
    14,711x = 196,369,952.40
  5. Step 5: Solve for x
    x = 196,369,952.40/14,711
  6. Step 6: Final answer
    x = 13,348.51

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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.