Home / 12,990.35-19,499.30-10,554.57

Finding the Fourth Proportional to 12,990.35, 19,499.30 and 10,554.57

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Solution

The fourth proportional to 12,990.35, 19,499.30 and 10,554.57 is: 15,843.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.35 : 19,499.30 = 10,554.57 : x
  2. Step 2: Convert to fraction form
    12,990.35/19,499.30 = 10,554.57/x
  3. Step 3: Cross multiply
    12,990.35x = 19,499.30 × 10,554.57
  4. Step 4: Simplify right side
    12,990.35x = 205,806,674.03
  5. Step 5: Solve for x
    x = 205,806,674.03/12,990.35
  6. Step 6: Final answer
    x = 15,843.05

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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.