Home / 21,728.40-29,983.41-12,776.28

Finding the Fourth Proportional to 21,728.40, 29,983.41 and 12,776.28

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Solution

The fourth proportional to 21,728.40, 29,983.41 and 12,776.28 is: 17,630.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,728.40 : 29,983.41 = 12,776.28 : x
  2. Step 2: Convert to fraction form
    21,728.40/29,983.41 = 12,776.28/x
  3. Step 3: Cross multiply
    21,728.40x = 29,983.41 × 12,776.28
  4. Step 4: Simplify right side
    21,728.40x = 383,076,441.51
  5. Step 5: Solve for x
    x = 383,076,441.51/21,728.40
  6. Step 6: Final answer
    x = 17,630.22

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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.