Home / 21,430.32-29,572.20-11,997.60

Finding the Fourth Proportional to 21,430.32, 29,572.20 and 11,997.60

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Solution

The fourth proportional to 21,430.32, 29,572.20 and 11,997.60 is: 16,555.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.32 : 29,572.20 = 11,997.60 : x
  2. Step 2: Convert to fraction form
    21,430.32/29,572.20 = 11,997.60/x
  3. Step 3: Cross multiply
    21,430.32x = 29,572.20 × 11,997.60
  4. Step 4: Simplify right side
    21,430.32x = 354,795,426.72
  5. Step 5: Solve for x
    x = 354,795,426.72/21,430.32
  6. Step 6: Final answer
    x = 16,555.77

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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.