Home / 21,557.70-29,752.38-12,126.20

Finding the Fourth Proportional to 21,557.70, 29,752.38 and 12,126.20

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Solution

The fourth proportional to 21,557.70, 29,752.38 and 12,126.20 is: 16,735.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,557.70 : 29,752.38 = 12,126.20 : x
  2. Step 2: Convert to fraction form
    21,557.70/29,752.38 = 12,126.20/x
  3. Step 3: Cross multiply
    21,557.70x = 29,752.38 × 12,126.20
  4. Step 4: Simplify right side
    21,557.70x = 360,783,161.59
  5. Step 5: Solve for x
    x = 360,783,161.59/21,557.70
  6. Step 6: Final answer
    x = 16,735.70

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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.