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Finding the Fourth Proportional to 14,643.60, 21,965.40 and 12,019.20

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Solution

The fourth proportional to 14,643.60, 21,965.40 and 12,019.20 is: 18,028.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,643.60 : 21,965.40 = 12,019.20 : x
  2. Step 2: Convert to fraction form
    14,643.60/21,965.40 = 12,019.20/x
  3. Step 3: Cross multiply
    14,643.60x = 21,965.40 × 12,019.20
  4. Step 4: Simplify right side
    14,643.60x = 264,006,535.68
  5. Step 5: Solve for x
    x = 264,006,535.68/14,643.60
  6. Step 6: Final answer
    x = 18,028.80

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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.