Home / 21,859.38-30,165.30-12,299.81

Finding the Fourth Proportional to 21,859.38, 30,165.30 and 12,299.81

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Solution

The fourth proportional to 21,859.38, 30,165.30 and 12,299.81 is: 16,973.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,859.38 : 30,165.30 = 12,299.81 : x
  2. Step 2: Convert to fraction form
    21,859.38/30,165.30 = 12,299.81/x
  3. Step 3: Cross multiply
    21,859.38x = 30,165.30 × 12,299.81
  4. Step 4: Simplify right side
    21,859.38x = 371,027,307.77
  5. Step 5: Solve for x
    x = 371,027,307.77/21,859.38
  6. Step 6: Final answer
    x = 16,973.37

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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.