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Finding the Fourth Proportional to 21,483.40, 32,205.66 and 7,629.16

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Solution

The fourth proportional to 21,483.40, 32,205.66 and 7,629.16 is: 11,436.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,483.40 : 32,205.66 = 7,629.16 : x
  2. Step 2: Convert to fraction form
    21,483.40/32,205.66 = 7,629.16/x
  3. Step 3: Cross multiply
    21,483.40x = 32,205.66 × 7,629.16
  4. Step 4: Simplify right side
    21,483.40x = 245,702,133.05
  5. Step 5: Solve for x
    x = 245,702,133.05/21,483.40
  6. Step 6: Final answer
    x = 11,436.84

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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.