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Finding the Fourth Proportional to 12,904.50, 17,808.21 and 7,315.50

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Solution

The fourth proportional to 12,904.50, 17,808.21 and 7,315.50 is: 10,095.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,904.50 : 17,808.21 = 7,315.50 : x
  2. Step 2: Convert to fraction form
    12,904.50/17,808.21 = 7,315.50/x
  3. Step 3: Cross multiply
    12,904.50x = 17,808.21 × 7,315.50
  4. Step 4: Simplify right side
    12,904.50x = 130,275,960.26
  5. Step 5: Solve for x
    x = 130,275,960.26/12,904.50
  6. Step 6: Final answer
    x = 10,095.39

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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.