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Finding the Fourth Proportional to 21,913.72, 32,870.62 and 6,332.60

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Solution

The fourth proportional to 21,913.72, 32,870.62 and 6,332.60 is: 9,498.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,913.72 : 32,870.62 = 6,332.60 : x
  2. Step 2: Convert to fraction form
    21,913.72/32,870.62 = 6,332.60/x
  3. Step 3: Cross multiply
    21,913.72x = 32,870.62 × 6,332.60
  4. Step 4: Simplify right side
    21,913.72x = 208,156,488.21
  5. Step 5: Solve for x
    x = 208,156,488.21/21,913.72
  6. Step 6: Final answer
    x = 9,498.91

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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.