Home / 14,990.50-20,667.66-12,291.78

Finding the Fourth Proportional to 14,990.50, 20,667.66 and 12,291.78

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Solution

The fourth proportional to 14,990.50, 20,667.66 and 12,291.78 is: 16,946.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,990.50 : 20,667.66 = 12,291.78 : x
  2. Step 2: Convert to fraction form
    14,990.50/20,667.66 = 12,291.78/x
  3. Step 3: Cross multiply
    14,990.50x = 20,667.66 × 12,291.78
  4. Step 4: Simplify right side
    14,990.50x = 254,042,329.83
  5. Step 5: Solve for x
    x = 254,042,329.83/14,990.50
  6. Step 6: Final answer
    x = 16,946.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.