Home / 15,728.09-21,703.77-8,557.94

Finding the Fourth Proportional to 15,728.09, 21,703.77 and 8,557.94

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Solution

The fourth proportional to 15,728.09, 21,703.77 and 8,557.94 is: 11,809.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,728.09 : 21,703.77 = 8,557.94 : x
  2. Step 2: Convert to fraction form
    15,728.09/21,703.77 = 8,557.94/x
  3. Step 3: Cross multiply
    15,728.09x = 21,703.77 × 8,557.94
  4. Step 4: Simplify right side
    15,728.09x = 185,739,561.43
  5. Step 5: Solve for x
    x = 185,739,561.43/15,728.09
  6. Step 6: Final answer
    x = 11,809.42

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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.