Home / 31,429.72-47,106.66-13,879.64

Finding the Fourth Proportional to 31,429.72, 47,106.66 and 13,879.64

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Solution

The fourth proportional to 31,429.72, 47,106.66 and 13,879.64 is: 20,802.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,429.72 : 47,106.66 = 13,879.64 : x
  2. Step 2: Convert to fraction form
    31,429.72/47,106.66 = 13,879.64/x
  3. Step 3: Cross multiply
    31,429.72x = 47,106.66 × 13,879.64
  4. Step 4: Simplify right side
    31,429.72x = 653,823,482.40
  5. Step 5: Solve for x
    x = 653,823,482.40/31,429.72
  6. Step 6: Final answer
    x = 20,802.71

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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.