Home / 13,141.65-18,135.33-7,173.57

Finding the Fourth Proportional to 13,141.65, 18,135.33 and 7,173.57

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Solution

The fourth proportional to 13,141.65, 18,135.33 and 7,173.57 is: 9,899.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,141.65 : 18,135.33 = 7,173.57 : x
  2. Step 2: Convert to fraction form
    13,141.65/18,135.33 = 7,173.57/x
  3. Step 3: Cross multiply
    13,141.65x = 18,135.33 × 7,173.57
  4. Step 4: Simplify right side
    13,141.65x = 130,095,059.23
  5. Step 5: Solve for x
    x = 130,095,059.23/13,141.65
  6. Step 6: Final answer
    x = 9,899.45

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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.