Home / 13,431.48-18,534.03-7,765.34

Finding the Fourth Proportional to 13,431.48, 18,534.03 and 7,765.34

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Solution

The fourth proportional to 13,431.48, 18,534.03 and 7,765.34 is: 10,715.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431.48 : 18,534.03 = 7,765.34 : x
  2. Step 2: Convert to fraction form
    13,431.48/18,534.03 = 7,765.34/x
  3. Step 3: Cross multiply
    13,431.48x = 18,534.03 × 7,765.34
  4. Step 4: Simplify right side
    13,431.48x = 143,922,951.85
  5. Step 5: Solve for x
    x = 143,922,951.85/13,431.48
  6. Step 6: Final answer
    x = 10,715.35

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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.