Home / 31,919.40-47,879.10-11,140.20

Finding the Fourth Proportional to 31,919.40, 47,879.10 and 11,140.20

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Solution

The fourth proportional to 31,919.40, 47,879.10 and 11,140.20 is: 16,710.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,919.40 : 47,879.10 = 11,140.20 : x
  2. Step 2: Convert to fraction form
    31,919.40/47,879.10 = 11,140.20/x
  3. Step 3: Cross multiply
    31,919.40x = 47,879.10 × 11,140.20
  4. Step 4: Simplify right side
    31,919.40x = 533,382,749.82
  5. Step 5: Solve for x
    x = 533,382,749.82/31,919.40
  6. Step 6: Final answer
    x = 16,710.30

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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.