Home / 21,764.91-30,035.30-12,812.79

Finding the Fourth Proportional to 21,764.91, 30,035.30 and 12,812.79

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Solution

The fourth proportional to 21,764.91, 30,035.30 and 12,812.79 is: 17,681.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,764.91 : 30,035.30 = 12,812.79 : x
  2. Step 2: Convert to fraction form
    21,764.91/30,035.30 = 12,812.79/x
  3. Step 3: Cross multiply
    21,764.91x = 30,035.30 × 12,812.79
  4. Step 4: Simplify right side
    21,764.91x = 384,835,927.42
  5. Step 5: Solve for x
    x = 384,835,927.42/21,764.91
  6. Step 6: Final answer
    x = 17,681.48

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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.