Home / 21,191.93-31,798.22-8,715.69

Finding the Fourth Proportional to 21,191.93, 31,798.22 and 8,715.69

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Solution

The fourth proportional to 21,191.93, 31,798.22 and 8,715.69 is: 13,077.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.93 : 31,798.22 = 8,715.69 : x
  2. Step 2: Convert to fraction form
    21,191.93/31,798.22 = 8,715.69/x
  3. Step 3: Cross multiply
    21,191.93x = 31,798.22 × 8,715.69
  4. Step 4: Simplify right side
    21,191.93x = 277,143,384.49
  5. Step 5: Solve for x
    x = 277,143,384.49/21,191.93
  6. Step 6: Final answer
    x = 13,077.78

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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.