Home / 31,116.79-46,644.81-12,391.21

Finding the Fourth Proportional to 31,116.79, 46,644.81 and 12,391.21

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Solution

The fourth proportional to 31,116.79, 46,644.81 and 12,391.21 is: 18,574.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,116.79 : 46,644.81 = 12,391.21 : x
  2. Step 2: Convert to fraction form
    31,116.79/46,644.81 = 12,391.21/x
  3. Step 3: Cross multiply
    31,116.79x = 46,644.81 × 12,391.21
  4. Step 4: Simplify right side
    31,116.79x = 577,985,636.12
  5. Step 5: Solve for x
    x = 577,985,636.12/31,116.79
  6. Step 6: Final answer
    x = 18,574.72

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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.