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Finding the Fourth Proportional to 13,139, 18,127.44 and 7,833.08

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Solution

The fourth proportional to 13,139, 18,127.44 and 7,833.08 is: 10,807.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139 : 18,127.44 = 7,833.08 : x
  2. Step 2: Convert to fraction form
    13,139/18,127.44 = 7,833.08/x
  3. Step 3: Cross multiply
    13,139x = 18,127.44 × 7,833.08
  4. Step 4: Simplify right side
    13,139x = 141,993,687.72
  5. Step 5: Solve for x
    x = 141,993,687.72/13,139
  6. Step 6: Final answer
    x = 10,807.04

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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.