Home / 12,390.54-17,097.80-7,353.88

Finding the Fourth Proportional to 12,390.54, 17,097.80 and 7,353.88

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Solution

The fourth proportional to 12,390.54, 17,097.80 and 7,353.88 is: 10,147.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.54 : 17,097.80 = 7,353.88 : x
  2. Step 2: Convert to fraction form
    12,390.54/17,097.80 = 7,353.88/x
  3. Step 3: Cross multiply
    12,390.54x = 17,097.80 × 7,353.88
  4. Step 4: Simplify right side
    12,390.54x = 125,735,169.46
  5. Step 5: Solve for x
    x = 125,735,169.46/12,390.54
  6. Step 6: Final answer
    x = 10,147.67

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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.