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Finding the Fourth Proportional to 15,658.84, 21,609.12 and 8,488.73

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Solution

The fourth proportional to 15,658.84, 21,609.12 and 8,488.73 is: 11,714.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,658.84 : 21,609.12 = 8,488.73 : x
  2. Step 2: Convert to fraction form
    15,658.84/21,609.12 = 8,488.73/x
  3. Step 3: Cross multiply
    15,658.84x = 21,609.12 × 8,488.73
  4. Step 4: Simplify right side
    15,658.84x = 183,433,985.22
  5. Step 5: Solve for x
    x = 183,433,985.22/15,658.84
  6. Step 6: Final answer
    x = 11,714.40

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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.