Home / 20,964.34-28,927.62-11,889.20

Finding the Fourth Proportional to 20,964.34, 28,927.62 and 11,889.20

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Solution

The fourth proportional to 20,964.34, 28,927.62 and 11,889.20 is: 16,405.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,964.34 : 28,927.62 = 11,889.20 : x
  2. Step 2: Convert to fraction form
    20,964.34/28,927.62 = 11,889.20/x
  3. Step 3: Cross multiply
    20,964.34x = 28,927.62 × 11,889.20
  4. Step 4: Simplify right side
    20,964.34x = 343,926,259.70
  5. Step 5: Solve for x
    x = 343,926,259.70/20,964.34
  6. Step 6: Final answer
    x = 16,405.30

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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.