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Finding the Fourth Proportional to 21,967.92, 30,315.80 and 11,896.40

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Solution

The fourth proportional to 21,967.92, 30,315.80 and 11,896.40 is: 16,417.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,967.92 : 30,315.80 = 11,896.40 : x
  2. Step 2: Convert to fraction form
    21,967.92/30,315.80 = 11,896.40/x
  3. Step 3: Cross multiply
    21,967.92x = 30,315.80 × 11,896.40
  4. Step 4: Simplify right side
    21,967.92x = 360,648,883.12
  5. Step 5: Solve for x
    x = 360,648,883.12/21,967.92
  6. Step 6: Final answer
    x = 16,417.07

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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.