Home / 21,320.75-29,423.43-11,891.13

Finding the Fourth Proportional to 21,320.75, 29,423.43 and 11,891.13

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Solution

The fourth proportional to 21,320.75, 29,423.43 and 11,891.13 is: 16,410.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.75 : 29,423.43 = 11,891.13 : x
  2. Step 2: Convert to fraction form
    21,320.75/29,423.43 = 11,891.13/x
  3. Step 3: Cross multiply
    21,320.75x = 29,423.43 × 11,891.13
  4. Step 4: Simplify right side
    21,320.75x = 349,877,831.18
  5. Step 5: Solve for x
    x = 349,877,831.18/21,320.75
  6. Step 6: Final answer
    x = 16,410.21

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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.