Home / 15,529.86-21,431.40-8,456.28

Finding the Fourth Proportional to 15,529.86, 21,431.40 and 8,456.28

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Solution

The fourth proportional to 15,529.86, 21,431.40 and 8,456.28 is: 11,669.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.86 : 21,431.40 = 8,456.28 : x
  2. Step 2: Convert to fraction form
    15,529.86/21,431.40 = 8,456.28/x
  3. Step 3: Cross multiply
    15,529.86x = 21,431.40 × 8,456.28
  4. Step 4: Simplify right side
    15,529.86x = 181,229,919.19
  5. Step 5: Solve for x
    x = 181,229,919.19/15,529.86
  6. Step 6: Final answer
    x = 11,669.77

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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.