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Finding the Fourth Proportional to 21,885.70, 32,821.86 and 14,388.94

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Solution

The fourth proportional to 21,885.70, 32,821.86 and 14,388.94 is: 21,579.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,885.70 : 32,821.86 = 14,388.94 : x
  2. Step 2: Convert to fraction form
    21,885.70/32,821.86 = 14,388.94/x
  3. Step 3: Cross multiply
    21,885.70x = 32,821.86 × 14,388.94
  4. Step 4: Simplify right side
    21,885.70x = 472,271,774.23
  5. Step 5: Solve for x
    x = 472,271,774.23/21,885.70
  6. Step 6: Final answer
    x = 21,579.01

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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.