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Finding the Fourth Proportional to 14,869.88, 20,529.40 and 9,212.20

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Solution

The fourth proportional to 14,869.88, 20,529.40 and 9,212.20 is: 12,718.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,869.88 : 20,529.40 = 9,212.20 : x
  2. Step 2: Convert to fraction form
    14,869.88/20,529.40 = 9,212.20/x
  3. Step 3: Cross multiply
    14,869.88x = 20,529.40 × 9,212.20
  4. Step 4: Simplify right side
    14,869.88x = 189,120,938.68
  5. Step 5: Solve for x
    x = 189,120,938.68/14,869.88
  6. Step 6: Final answer
    x = 12,718.39

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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.