Home / 13,172.31-18,172.59-8,127.74

Finding the Fourth Proportional to 13,172.31, 18,172.59 and 8,127.74

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Solution

The fourth proportional to 13,172.31, 18,172.59 and 8,127.74 is: 11,213.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,172.31 : 18,172.59 = 8,127.74 : x
  2. Step 2: Convert to fraction form
    13,172.31/18,172.59 = 8,127.74/x
  3. Step 3: Cross multiply
    13,172.31x = 18,172.59 × 8,127.74
  4. Step 4: Simplify right side
    13,172.31x = 147,702,086.65
  5. Step 5: Solve for x
    x = 147,702,086.65/13,172.31
  6. Step 6: Final answer
    x = 11,213.07

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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.