Home / 21,035.40-31,514.70-12,817.80

Finding the Fourth Proportional to 21,035.40, 31,514.70 and 12,817.80

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Solution

The fourth proportional to 21,035.40, 31,514.70 and 12,817.80 is: 19,203.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,035.40 : 31,514.70 = 12,817.80 : x
  2. Step 2: Convert to fraction form
    21,035.40/31,514.70 = 12,817.80/x
  3. Step 3: Cross multiply
    21,035.40x = 31,514.70 × 12,817.80
  4. Step 4: Simplify right side
    21,035.40x = 403,949,121.66
  5. Step 5: Solve for x
    x = 403,949,121.66/21,035.40
  6. Step 6: Final answer
    x = 19,203.30

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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.