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Finding the Fourth Proportional to 15,644.40, 21,590.82 and 8,931.04

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Solution

The fourth proportional to 15,644.40, 21,590.82 and 8,931.04 is: 12,325.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,644.40 : 21,590.82 = 8,931.04 : x
  2. Step 2: Convert to fraction form
    15,644.40/21,590.82 = 8,931.04/x
  3. Step 3: Cross multiply
    15,644.40x = 21,590.82 × 8,931.04
  4. Step 4: Simplify right side
    15,644.40x = 192,828,324.44
  5. Step 5: Solve for x
    x = 192,828,324.44/15,644.40
  6. Step 6: Final answer
    x = 12,325.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.