Home / 21,769.75-30,045.09-12,818.08

Finding the Fourth Proportional to 21,769.75, 30,045.09 and 12,818.08

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Solution

The fourth proportional to 21,769.75, 30,045.09 and 12,818.08 is: 17,690.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,769.75 : 30,045.09 = 12,818.08 : x
  2. Step 2: Convert to fraction form
    21,769.75/30,045.09 = 12,818.08/x
  3. Step 3: Cross multiply
    21,769.75x = 30,045.09 × 12,818.08
  4. Step 4: Simplify right side
    21,769.75x = 385,120,367.23
  5. Step 5: Solve for x
    x = 385,120,367.23/21,769.75
  6. Step 6: Final answer
    x = 17,690.62

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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.