Home / 21,749.06-30,012.70-12,317.70

Finding the Fourth Proportional to 21,749.06, 30,012.70 and 12,317.70

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Solution

The fourth proportional to 21,749.06, 30,012.70 and 12,317.70 is: 16,997.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,749.06 : 30,012.70 = 12,317.70 : x
  2. Step 2: Convert to fraction form
    21,749.06/30,012.70 = 12,317.70/x
  3. Step 3: Cross multiply
    21,749.06x = 30,012.70 × 12,317.70
  4. Step 4: Simplify right side
    21,749.06x = 369,687,434.79
  5. Step 5: Solve for x
    x = 369,687,434.79/21,749.06
  6. Step 6: Final answer
    x = 16,997.86

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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.