Home / 21,512.55-29,670.89-15,563.91

Finding the Fourth Proportional to 21,512.55, 29,670.89 and 15,563.91

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Solution

The fourth proportional to 21,512.55, 29,670.89 and 15,563.91 is: 21,466.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,512.55 : 29,670.89 = 15,563.91 : x
  2. Step 2: Convert to fraction form
    21,512.55/29,670.89 = 15,563.91/x
  3. Step 3: Cross multiply
    21,512.55x = 29,670.89 × 15,563.91
  4. Step 4: Simplify right side
    21,512.55x = 461,795,061.58
  5. Step 5: Solve for x
    x = 461,795,061.58/21,512.55
  6. Step 6: Final answer
    x = 21,466.31

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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.