Home / 14,153.82-21,135-12,309.18

Finding the Fourth Proportional to 14,153.82, 21,135 and 12,309.18

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Solution

The fourth proportional to 14,153.82, 21,135 and 12,309.18 is: 18,380.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,153.82 : 21,135 = 12,309.18 : x
  2. Step 2: Convert to fraction form
    14,153.82/21,135 = 12,309.18/x
  3. Step 3: Cross multiply
    14,153.82x = 21,135 × 12,309.18
  4. Step 4: Simplify right side
    14,153.82x = 260,154,519.30
  5. Step 5: Solve for x
    x = 260,154,519.30/14,153.82
  6. Step 6: Final answer
    x = 18,380.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.