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Finding the Fourth Proportional to 12,658.99, 19,000.40 and 6,423.47

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Solution

The fourth proportional to 12,658.99, 19,000.40 and 6,423.47 is: 9,641.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,658.99 : 19,000.40 = 6,423.47 : x
  2. Step 2: Convert to fraction form
    12,658.99/19,000.40 = 6,423.47/x
  3. Step 3: Cross multiply
    12,658.99x = 19,000.40 × 6,423.47
  4. Step 4: Simplify right side
    12,658.99x = 122,048,467.27
  5. Step 5: Solve for x
    x = 122,048,467.27/12,658.99
  6. Step 6: Final answer
    x = 9,641.25

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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.