Home / 21,011.19-31,519.11-8,529.42

Finding the Fourth Proportional to 21,011.19, 31,519.11 and 8,529.42

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Solution

The fourth proportional to 21,011.19, 31,519.11 and 8,529.42 is: 12,795.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.19 : 31,519.11 = 8,529.42 : x
  2. Step 2: Convert to fraction form
    21,011.19/31,519.11 = 8,529.42/x
  3. Step 3: Cross multiply
    21,011.19x = 31,519.11 × 8,529.42
  4. Step 4: Simplify right side
    21,011.19x = 268,839,727.22
  5. Step 5: Solve for x
    x = 268,839,727.22/21,011.19
  6. Step 6: Final answer
    x = 12,795.07

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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.