Home / 31,578.30-47,358.81-11,855.34

Finding the Fourth Proportional to 31,578.30, 47,358.81 and 11,855.34

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Solution

The fourth proportional to 31,578.30, 47,358.81 and 11,855.34 is: 17,779.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,578.30 : 47,358.81 = 11,855.34 : x
  2. Step 2: Convert to fraction form
    31,578.30/47,358.81 = 11,855.34/x
  3. Step 3: Cross multiply
    31,578.30x = 47,358.81 × 11,855.34
  4. Step 4: Simplify right side
    31,578.30x = 561,454,794.55
  5. Step 5: Solve for x
    x = 561,454,794.55/31,578.30
  6. Step 6: Final answer
    x = 17,779.77

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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.