Home / 15,728.07-21,704.79-8,557.98

Finding the Fourth Proportional to 15,728.07, 21,704.79 and 8,557.98

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Solution

The fourth proportional to 15,728.07, 21,704.79 and 8,557.98 is: 11,810.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,728.07 : 21,704.79 = 8,557.98 : x
  2. Step 2: Convert to fraction form
    15,728.07/21,704.79 = 8,557.98/x
  3. Step 3: Cross multiply
    15,728.07x = 21,704.79 × 8,557.98
  4. Step 4: Simplify right side
    15,728.07x = 185,749,158.72
  5. Step 5: Solve for x
    x = 185,749,158.72/15,728.07
  6. Step 6: Final answer
    x = 11,810.04

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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.