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Finding the Fourth Proportional to 31,190.40, 46,785.60 and 10,411.20

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Solution

The fourth proportional to 31,190.40, 46,785.60 and 10,411.20 is: 15,616.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,190.40 : 46,785.60 = 10,411.20 : x
  2. Step 2: Convert to fraction form
    31,190.40/46,785.60 = 10,411.20/x
  3. Step 3: Cross multiply
    31,190.40x = 46,785.60 × 10,411.20
  4. Step 4: Simplify right side
    31,190.40x = 487,094,238.72
  5. Step 5: Solve for x
    x = 487,094,238.72/31,190.40
  6. Step 6: Final answer
    x = 15,616.80

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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.