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Finding the Fourth Proportional to 21,921.40, 32,855.10 and 14,901.40

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Solution

The fourth proportional to 21,921.40, 32,855.10 and 14,901.40 is: 22,333.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,921.40 : 32,855.10 = 14,901.40 : x
  2. Step 2: Convert to fraction form
    21,921.40/32,855.10 = 14,901.40/x
  3. Step 3: Cross multiply
    21,921.40x = 32,855.10 × 14,901.40
  4. Step 4: Simplify right side
    21,921.40x = 489,586,987.14
  5. Step 5: Solve for x
    x = 489,586,987.14/21,921.40
  6. Step 6: Final answer
    x = 22,333.75

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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.