Home / 13,141.98-18,135.24-7,172.49

Finding the Fourth Proportional to 13,141.98, 18,135.24 and 7,172.49

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Solution

The fourth proportional to 13,141.98, 18,135.24 and 7,172.49 is: 9,897.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,141.98 : 18,135.24 = 7,172.49 : x
  2. Step 2: Convert to fraction form
    13,141.98/18,135.24 = 7,172.49/x
  3. Step 3: Cross multiply
    13,141.98x = 18,135.24 × 7,172.49
  4. Step 4: Simplify right side
    13,141.98x = 130,074,806.99
  5. Step 5: Solve for x
    x = 130,074,806.99/13,141.98
  6. Step 6: Final answer
    x = 9,897.66

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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.