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Finding the Fourth Proportional to 14,363.60, 21,545.40 and 12,419.60

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Solution

The fourth proportional to 14,363.60, 21,545.40 and 12,419.60 is: 18,629.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,363.60 : 21,545.40 = 12,419.60 : x
  2. Step 2: Convert to fraction form
    14,363.60/21,545.40 = 12,419.60/x
  3. Step 3: Cross multiply
    14,363.60x = 21,545.40 × 12,419.60
  4. Step 4: Simplify right side
    14,363.60x = 267,585,249.84
  5. Step 5: Solve for x
    x = 267,585,249.84/14,363.60
  6. Step 6: Final answer
    x = 18,629.40

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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.