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Finding the Fourth Proportional to 21,618.32, 32,435.58 and 7,579.40

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Solution

The fourth proportional to 21,618.32, 32,435.58 and 7,579.40 is: 11,371.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,618.32 : 32,435.58 = 7,579.40 : x
  2. Step 2: Convert to fraction form
    21,618.32/32,435.58 = 7,579.40/x
  3. Step 3: Cross multiply
    21,618.32x = 32,435.58 × 7,579.40
  4. Step 4: Simplify right side
    21,618.32x = 245,842,235.05
  5. Step 5: Solve for x
    x = 245,842,235.05/21,618.32
  6. Step 6: Final answer
    x = 11,371.94

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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.