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Finding the Fourth Proportional to 12,904.75, 17,808.83 and 7,315.75

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Solution

The fourth proportional to 12,904.75, 17,808.83 and 7,315.75 is: 10,095.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,904.75 : 17,808.83 = 7,315.75 : x
  2. Step 2: Convert to fraction form
    12,904.75/17,808.83 = 7,315.75/x
  3. Step 3: Cross multiply
    12,904.75x = 17,808.83 × 7,315.75
  4. Step 4: Simplify right side
    12,904.75x = 130,284,948.07
  5. Step 5: Solve for x
    x = 130,284,948.07/12,904.75
  6. Step 6: Final answer
    x = 10,095.89

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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.