Home / 12,990.18-17,926.34-7,021.80

Finding the Fourth Proportional to 12,990.18, 17,926.34 and 7,021.80

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Solution

The fourth proportional to 12,990.18, 17,926.34 and 7,021.80 is: 9,690.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.18 : 17,926.34 = 7,021.80 : x
  2. Step 2: Convert to fraction form
    12,990.18/17,926.34 = 7,021.80/x
  3. Step 3: Cross multiply
    12,990.18x = 17,926.34 × 7,021.80
  4. Step 4: Simplify right side
    12,990.18x = 125,875,174.21
  5. Step 5: Solve for x
    x = 125,875,174.21/12,990.18
  6. Step 6: Final answer
    x = 9,690.03

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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.