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Finding the Fourth Proportional to 21,579.57, 32,384.03 and 7,728.57

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Solution

The fourth proportional to 21,579.57, 32,384.03 and 7,728.57 is: 11,598.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,579.57 : 32,384.03 = 7,728.57 : x
  2. Step 2: Convert to fraction form
    21,579.57/32,384.03 = 7,728.57/x
  3. Step 3: Cross multiply
    21,579.57x = 32,384.03 × 7,728.57
  4. Step 4: Simplify right side
    21,579.57x = 250,282,204.09
  5. Step 5: Solve for x
    x = 250,282,204.09/21,579.57
  6. Step 6: Final answer
    x = 11,598.11

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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.