Home / 21,288.45-29,378.58-11,857.17

Finding the Fourth Proportional to 21,288.45, 29,378.58 and 11,857.17

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Solution

The fourth proportional to 21,288.45, 29,378.58 and 11,857.17 is: 16,363.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.45 : 29,378.58 = 11,857.17 : x
  2. Step 2: Convert to fraction form
    21,288.45/29,378.58 = 11,857.17/x
  3. Step 3: Cross multiply
    21,288.45x = 29,378.58 × 11,857.17
  4. Step 4: Simplify right side
    21,288.45x = 348,346,817.42
  5. Step 5: Solve for x
    x = 348,346,817.42/21,288.45
  6. Step 6: Final answer
    x = 16,363.18

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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.