Home / 13,228.48-18,255.20-7,642.56

Finding the Fourth Proportional to 13,228.48, 18,255.20 and 7,642.56

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Solution

The fourth proportional to 13,228.48, 18,255.20 and 7,642.56 is: 10,546.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,228.48 : 18,255.20 = 7,642.56 : x
  2. Step 2: Convert to fraction form
    13,228.48/18,255.20 = 7,642.56/x
  3. Step 3: Cross multiply
    13,228.48x = 18,255.20 × 7,642.56
  4. Step 4: Simplify right side
    13,228.48x = 139,516,461.31
  5. Step 5: Solve for x
    x = 139,516,461.31/13,228.48
  6. Step 6: Final answer
    x = 10,546.67

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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.