Home / 13,431.40-20,147.10-4,667.20

Finding the Fourth Proportional to 13,431.40, 20,147.10 and 4,667.20

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Solution

The fourth proportional to 13,431.40, 20,147.10 and 4,667.20 is: 7,000.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431.40 : 20,147.10 = 4,667.20 : x
  2. Step 2: Convert to fraction form
    13,431.40/20,147.10 = 4,667.20/x
  3. Step 3: Cross multiply
    13,431.40x = 20,147.10 × 4,667.20
  4. Step 4: Simplify right side
    13,431.40x = 94,030,545.12
  5. Step 5: Solve for x
    x = 94,030,545.12/13,431.40
  6. Step 6: Final answer
    x = 7,000.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.