Home / 21,147.88-31,700.70-14,133.80

Finding the Fourth Proportional to 21,147.88, 31,700.70 and 14,133.80

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Solution

The fourth proportional to 21,147.88, 31,700.70 and 14,133.80 is: 21,186.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.88 : 31,700.70 = 14,133.80 : x
  2. Step 2: Convert to fraction form
    21,147.88/31,700.70 = 14,133.80/x
  3. Step 3: Cross multiply
    21,147.88x = 31,700.70 × 14,133.80
  4. Step 4: Simplify right side
    21,147.88x = 448,051,353.66
  5. Step 5: Solve for x
    x = 448,051,353.66/21,147.88
  6. Step 6: Final answer
    x = 21,186.58

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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.