Home / 31,215.70-46,827.60-15,428.80

Finding the Fourth Proportional to 31,215.70, 46,827.60 and 15,428.80

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Solution

The fourth proportional to 31,215.70, 46,827.60 and 15,428.80 is: 23,145.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,215.70 : 46,827.60 = 15,428.80 : x
  2. Step 2: Convert to fraction form
    31,215.70/46,827.60 = 15,428.80/x
  3. Step 3: Cross multiply
    31,215.70x = 46,827.60 × 15,428.80
  4. Step 4: Simplify right side
    31,215.70x = 722,493,674.88
  5. Step 5: Solve for x
    x = 722,493,674.88/31,215.70
  6. Step 6: Final answer
    x = 23,145.20

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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.