Home / 15,445.79-21,315.00-8,372.06

Finding the Fourth Proportional to 15,445.79, 21,315.00 and 8,372.06

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Solution

The fourth proportional to 15,445.79, 21,315.00 and 8,372.06 is: 11,553.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,445.79 : 21,315.00 = 8,372.06 : x
  2. Step 2: Convert to fraction form
    15,445.79/21,315.00 = 8,372.06/x
  3. Step 3: Cross multiply
    15,445.79x = 21,315.00 × 8,372.06
  4. Step 4: Simplify right side
    15,445.79x = 178,450,416.56
  5. Step 5: Solve for x
    x = 178,450,416.56/15,445.79
  6. Step 6: Final answer
    x = 11,553.34

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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.