Home / 13,279.21-18,325.79-7,615.03

Finding the Fourth Proportional to 13,279.21, 18,325.79 and 7,615.03

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Solution

The fourth proportional to 13,279.21, 18,325.79 and 7,615.03 is: 10,509.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.21 : 18,325.79 = 7,615.03 : x
  2. Step 2: Convert to fraction form
    13,279.21/18,325.79 = 7,615.03/x
  3. Step 3: Cross multiply
    13,279.21x = 18,325.79 × 7,615.03
  4. Step 4: Simplify right side
    13,279.21x = 139,551,462.49
  5. Step 5: Solve for x
    x = 139,551,462.49/13,279.21
  6. Step 6: Final answer
    x = 10,509.02

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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.