Home / 21,653.57-29,861.64-14,372.78

Finding the Fourth Proportional to 21,653.57, 29,861.64 and 14,372.78

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Solution

The fourth proportional to 21,653.57, 29,861.64 and 14,372.78 is: 19,820.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,653.57 : 29,861.64 = 14,372.78 : x
  2. Step 2: Convert to fraction form
    21,653.57/29,861.64 = 14,372.78/x
  3. Step 3: Cross multiply
    21,653.57x = 29,861.64 × 14,372.78
  4. Step 4: Simplify right side
    21,653.57x = 429,194,744.83
  5. Step 5: Solve for x
    x = 429,194,744.83/21,653.57
  6. Step 6: Final answer
    x = 19,820.97

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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.