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Finding the Fourth Proportional to 12,903.81, 17,808.44 and 7,868.31

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Solution

The fourth proportional to 12,903.81, 17,808.44 and 7,868.31 is: 10,858.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,903.81 : 17,808.44 = 7,868.31 : x
  2. Step 2: Convert to fraction form
    12,903.81/17,808.44 = 7,868.31/x
  3. Step 3: Cross multiply
    12,903.81x = 17,808.44 × 7,868.31
  4. Step 4: Simplify right side
    12,903.81x = 140,122,287.19
  5. Step 5: Solve for x
    x = 140,122,287.19/12,903.81
  6. Step 6: Final answer
    x = 10,858.99

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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.