Home / 31,115.52-46,638.72-12,390.66

Finding the Fourth Proportional to 31,115.52, 46,638.72 and 12,390.66

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Solution

The fourth proportional to 31,115.52, 46,638.72 and 12,390.66 is: 18,572.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,115.52 : 46,638.72 = 12,390.66 : x
  2. Step 2: Convert to fraction form
    31,115.52/46,638.72 = 12,390.66/x
  3. Step 3: Cross multiply
    31,115.52x = 46,638.72 × 12,390.66
  4. Step 4: Simplify right side
    31,115.52x = 577,884,522.36
  5. Step 5: Solve for x
    x = 577,884,522.36/31,115.52
  6. Step 6: Final answer
    x = 18,572.23

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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.