Home / 12,990.15-17,926.35-7,021.83

Finding the Fourth Proportional to 12,990.15, 17,926.35 and 7,021.83

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Solution

The fourth proportional to 12,990.15, 17,926.35 and 7,021.83 is: 9,690.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.15 : 17,926.35 = 7,021.83 : x
  2. Step 2: Convert to fraction form
    12,990.15/17,926.35 = 7,021.83/x
  3. Step 3: Cross multiply
    12,990.15x = 17,926.35 × 7,021.83
  4. Step 4: Simplify right side
    12,990.15x = 125,875,782.22
  5. Step 5: Solve for x
    x = 125,875,782.22/12,990.15
  6. Step 6: Final answer
    x = 9,690.09

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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.