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Finding the Fourth Proportional to 21,904.88, 32,880.70 and 9,431.08

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Solution

The fourth proportional to 21,904.88, 32,880.70 and 9,431.08 is: 14,156.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,904.88 : 32,880.70 = 9,431.08 : x
  2. Step 2: Convert to fraction form
    21,904.88/32,880.70 = 9,431.08/x
  3. Step 3: Cross multiply
    21,904.88x = 32,880.70 × 9,431.08
  4. Step 4: Simplify right side
    21,904.88x = 310,100,512.16
  5. Step 5: Solve for x
    x = 310,100,512.16/21,904.88
  6. Step 6: Final answer
    x = 14,156.69

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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.