Home / 21,149.88-31,703.70-14,135.80

Finding the Fourth Proportional to 21,149.88, 31,703.70 and 14,135.80

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Solution

The fourth proportional to 21,149.88, 31,703.70 and 14,135.80 is: 21,189.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.88 : 31,703.70 = 14,135.80 : x
  2. Step 2: Convert to fraction form
    21,149.88/31,703.70 = 14,135.80/x
  3. Step 3: Cross multiply
    21,149.88x = 31,703.70 × 14,135.80
  4. Step 4: Simplify right side
    21,149.88x = 448,157,162.46
  5. Step 5: Solve for x
    x = 448,157,162.46/21,149.88
  6. Step 6: Final answer
    x = 21,189.58

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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.