Home / 21,320.53-29,422.38-11,889.70

Finding the Fourth Proportional to 21,320.53, 29,422.38 and 11,889.70

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Solution

The fourth proportional to 21,320.53, 29,422.38 and 11,889.70 is: 16,407.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.53 : 29,422.38 = 11,889.70 : x
  2. Step 2: Convert to fraction form
    21,320.53/29,422.38 = 11,889.70/x
  3. Step 3: Cross multiply
    21,320.53x = 29,422.38 × 11,889.70
  4. Step 4: Simplify right side
    21,320.53x = 349,823,271.49
  5. Step 5: Solve for x
    x = 349,823,271.49/21,320.53
  6. Step 6: Final answer
    x = 16,407.81

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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.