Home / 31,353.90-47,029.60-7,980.94

Finding the Fourth Proportional to 31,353.90, 47,029.60 and 7,980.94

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Solution

The fourth proportional to 31,353.90, 47,029.60 and 7,980.94 is: 11,971.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,353.90 : 47,029.60 = 7,980.94 : x
  2. Step 2: Convert to fraction form
    31,353.90/47,029.60 = 7,980.94/x
  3. Step 3: Cross multiply
    31,353.90x = 47,029.60 × 7,980.94
  4. Step 4: Simplify right side
    31,353.90x = 375,340,415.82
  5. Step 5: Solve for x
    x = 375,340,415.82/31,353.90
  6. Step 6: Final answer
    x = 11,971.09

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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.