Home / 21,288.42-29,378.93-11,856.98

Finding the Fourth Proportional to 21,288.42, 29,378.93 and 11,856.98

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Solution

The fourth proportional to 21,288.42, 29,378.93 and 11,856.98 is: 16,363.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.42 : 29,378.93 = 11,856.98 : x
  2. Step 2: Convert to fraction form
    21,288.42/29,378.93 = 11,856.98/x
  3. Step 3: Cross multiply
    21,288.42x = 29,378.93 × 11,856.98
  4. Step 4: Simplify right side
    21,288.42x = 348,345,385.43
  5. Step 5: Solve for x
    x = 348,345,385.43/21,288.42
  6. Step 6: Final answer
    x = 16,363.14

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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.