Home / 11,431.21-17,130.72-5,420.89

Finding the Fourth Proportional to 11,431.21, 17,130.72 and 5,420.89

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Solution

The fourth proportional to 11,431.21, 17,130.72 and 5,420.89 is: 8,123.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,431.21 : 17,130.72 = 5,420.89 : x
  2. Step 2: Convert to fraction form
    11,431.21/17,130.72 = 5,420.89/x
  3. Step 3: Cross multiply
    11,431.21x = 17,130.72 × 5,420.89
  4. Step 4: Simplify right side
    11,431.21x = 92,863,748.74
  5. Step 5: Solve for x
    x = 92,863,748.74/11,431.21
  6. Step 6: Final answer
    x = 8,123.70

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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.