Home / 21,160.28-29,200.74-11,728.64

Finding the Fourth Proportional to 21,160.28, 29,200.74 and 11,728.64

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Solution

The fourth proportional to 21,160.28, 29,200.74 and 11,728.64 is: 16,185.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.28 : 29,200.74 = 11,728.64 : x
  2. Step 2: Convert to fraction form
    21,160.28/29,200.74 = 11,728.64/x
  3. Step 3: Cross multiply
    21,160.28x = 29,200.74 × 11,728.64
  4. Step 4: Simplify right side
    21,160.28x = 342,484,967.19
  5. Step 5: Solve for x
    x = 342,484,967.19/21,160.28
  6. Step 6: Final answer
    x = 16,185.28

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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.