Home / 15,529.43-21,430.62-8,455.86

Finding the Fourth Proportional to 15,529.43, 21,430.62 and 8,455.86

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Solution

The fourth proportional to 15,529.43, 21,430.62 and 8,455.86 is: 11,669.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.43 : 21,430.62 = 8,455.86 : x
  2. Step 2: Convert to fraction form
    15,529.43/21,430.62 = 8,455.86/x
  3. Step 3: Cross multiply
    15,529.43x = 21,430.62 × 8,455.86
  4. Step 4: Simplify right side
    15,529.43x = 181,214,322.43
  5. Step 5: Solve for x
    x = 181,214,322.43/15,529.43
  6. Step 6: Final answer
    x = 11,669.09

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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.