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Finding the Fourth Proportional to 12,899.99, 19,335.83 and 6,660.47

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Solution

The fourth proportional to 12,899.99, 19,335.83 and 6,660.47 is: 9,983.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,899.99 : 19,335.83 = 6,660.47 : x
  2. Step 2: Convert to fraction form
    12,899.99/19,335.83 = 6,660.47/x
  3. Step 3: Cross multiply
    12,899.99x = 19,335.83 × 6,660.47
  4. Step 4: Simplify right side
    12,899.99x = 128,785,585.66
  5. Step 5: Solve for x
    x = 128,785,585.66/12,899.99
  6. Step 6: Final answer
    x = 9,983.39

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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.