Home / 21,011.70-31,519.86-8,529.92

Finding the Fourth Proportional to 21,011.70, 31,519.86 and 8,529.92

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Solution

The fourth proportional to 21,011.70, 31,519.86 and 8,529.92 is: 12,795.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.70 : 31,519.86 = 8,529.92 : x
  2. Step 2: Convert to fraction form
    21,011.70/31,519.86 = 8,529.92/x
  3. Step 3: Cross multiply
    21,011.70x = 31,519.86 × 8,529.92
  4. Step 4: Simplify right side
    21,011.70x = 268,861,884.21
  5. Step 5: Solve for x
    x = 268,861,884.21/21,011.70
  6. Step 6: Final answer
    x = 12,795.82

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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.