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Finding the Fourth Proportional to 12,658.91, 19,000.28 and 6,423.39

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Solution

The fourth proportional to 12,658.91, 19,000.28 and 6,423.39 is: 9,641.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,658.91 : 19,000.28 = 6,423.39 : x
  2. Step 2: Convert to fraction form
    12,658.91/19,000.28 = 6,423.39/x
  3. Step 3: Cross multiply
    12,658.91x = 19,000.28 × 6,423.39
  4. Step 4: Simplify right side
    12,658.91x = 122,046,247.68
  5. Step 5: Solve for x
    x = 122,046,247.68/12,658.91
  6. Step 6: Final answer
    x = 9,641.14

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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.