Home / 13,140.66-18,133.74-7,172.37

Finding the Fourth Proportional to 13,140.66, 18,133.74 and 7,172.37

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Solution

The fourth proportional to 13,140.66, 18,133.74 and 7,172.37 is: 9,897.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.66 : 18,133.74 = 7,172.37 : x
  2. Step 2: Convert to fraction form
    13,140.66/18,133.74 = 7,172.37/x
  3. Step 3: Cross multiply
    13,140.66x = 18,133.74 × 7,172.37
  4. Step 4: Simplify right side
    13,140.66x = 130,061,892.76
  5. Step 5: Solve for x
    x = 130,061,892.76/13,140.66
  6. Step 6: Final answer
    x = 9,897.67

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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.