Home / 13,140.45-18,133.88-7,172.25

Finding the Fourth Proportional to 13,140.45, 18,133.88 and 7,172.25

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Solution

The fourth proportional to 13,140.45, 18,133.88 and 7,172.25 is: 9,897.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.45 : 18,133.88 = 7,172.25 : x
  2. Step 2: Convert to fraction form
    13,140.45/18,133.88 = 7,172.25/x
  3. Step 3: Cross multiply
    13,140.45x = 18,133.88 × 7,172.25
  4. Step 4: Simplify right side
    13,140.45x = 130,060,684.97
  5. Step 5: Solve for x
    x = 130,060,684.97/13,140.45
  6. Step 6: Final answer
    x = 9,897.73

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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.