Home / 21,728.81-29,985.77-11,792.81

Finding the Fourth Proportional to 21,728.81, 29,985.77 and 11,792.81

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Solution

The fourth proportional to 21,728.81, 29,985.77 and 11,792.81 is: 16,274.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,728.81 : 29,985.77 = 11,792.81 : x
  2. Step 2: Convert to fraction form
    21,728.81/29,985.77 = 11,792.81/x
  3. Step 3: Cross multiply
    21,728.81x = 29,985.77 × 11,792.81
  4. Step 4: Simplify right side
    21,728.81x = 353,616,488.31
  5. Step 5: Solve for x
    x = 353,616,488.31/21,728.81
  6. Step 6: Final answer
    x = 16,274.08

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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.