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Finding the Fourth Proportional to 12,889.77, 19,328.52 and 4,995.99

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Solution

The fourth proportional to 12,889.77, 19,328.52 and 4,995.99 is: 7,491.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,889.77 : 19,328.52 = 4,995.99 : x
  2. Step 2: Convert to fraction form
    12,889.77/19,328.52 = 4,995.99/x
  3. Step 3: Cross multiply
    12,889.77x = 19,328.52 × 4,995.99
  4. Step 4: Simplify right side
    12,889.77x = 96,565,092.63
  5. Step 5: Solve for x
    x = 96,565,092.63/12,889.77
  6. Step 6: Final answer
    x = 7,491.61

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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.