Home / 21,627.93-29,861.30-13,989.72

Finding the Fourth Proportional to 21,627.93, 29,861.30 and 13,989.72

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Solution

The fourth proportional to 21,627.93, 29,861.30 and 13,989.72 is: 19,315.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,627.93 : 29,861.30 = 13,989.72 : x
  2. Step 2: Convert to fraction form
    21,627.93/29,861.30 = 13,989.72/x
  3. Step 3: Cross multiply
    21,627.93x = 29,861.30 × 13,989.72
  4. Step 4: Simplify right side
    21,627.93x = 417,751,076.53
  5. Step 5: Solve for x
    x = 417,751,076.53/21,627.93
  6. Step 6: Final answer
    x = 19,315.35

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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.