Home / 20,990.88-31,451.76-14,666.40

Finding the Fourth Proportional to 20,990.88, 31,451.76 and 14,666.40

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Solution

The fourth proportional to 20,990.88, 31,451.76 and 14,666.40 is: 21,975.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.88 : 31,451.76 = 14,666.40 : x
  2. Step 2: Convert to fraction form
    20,990.88/31,451.76 = 14,666.40/x
  3. Step 3: Cross multiply
    20,990.88x = 31,451.76 × 14,666.40
  4. Step 4: Simplify right side
    20,990.88x = 461,284,092.86
  5. Step 5: Solve for x
    x = 461,284,092.86/20,990.88
  6. Step 6: Final answer
    x = 21,975.45

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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.