Home / 21,118.32-29,142.36-12,733.20

Finding the Fourth Proportional to 21,118.32, 29,142.36 and 12,733.20

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Solution

The fourth proportional to 21,118.32, 29,142.36 and 12,733.20 is: 17,571.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.32 : 29,142.36 = 12,733.20 : x
  2. Step 2: Convert to fraction form
    21,118.32/29,142.36 = 12,733.20/x
  3. Step 3: Cross multiply
    21,118.32x = 29,142.36 × 12,733.20
  4. Step 4: Simplify right side
    21,118.32x = 371,075,498.35
  5. Step 5: Solve for x
    x = 371,075,498.35/21,118.32
  6. Step 6: Final answer
    x = 17,571.26

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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.