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Finding the Fourth Proportional to 21,915.69, 32,881.16 and 6,925.09

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Solution

The fourth proportional to 21,915.69, 32,881.16 and 6,925.09 is: 10,390.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,915.69 : 32,881.16 = 6,925.09 : x
  2. Step 2: Convert to fraction form
    21,915.69/32,881.16 = 6,925.09/x
  3. Step 3: Cross multiply
    21,915.69x = 32,881.16 × 6,925.09
  4. Step 4: Simplify right side
    21,915.69x = 227,704,957.68
  5. Step 5: Solve for x
    x = 227,704,957.68/21,915.69
  6. Step 6: Final answer
    x = 10,390.05

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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.