Home / 13,349.80-20,040.90-7,431.40

Finding the Fourth Proportional to 13,349.80, 20,040.90 and 7,431.40

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Solution

The fourth proportional to 13,349.80, 20,040.90 and 7,431.40 is: 11,156.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,349.80 : 20,040.90 = 7,431.40 : x
  2. Step 2: Convert to fraction form
    13,349.80/20,040.90 = 7,431.40/x
  3. Step 3: Cross multiply
    13,349.80x = 20,040.90 × 7,431.40
  4. Step 4: Simplify right side
    13,349.80x = 148,931,944.26
  5. Step 5: Solve for x
    x = 148,931,944.26/13,349.80
  6. Step 6: Final answer
    x = 11,156.12

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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.