Home / 15,720.42-21,694.23-8,647.29

Finding the Fourth Proportional to 15,720.42, 21,694.23 and 8,647.29

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Solution

The fourth proportional to 15,720.42, 21,694.23 and 8,647.29 is: 11,933.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720.42 : 21,694.23 = 8,647.29 : x
  2. Step 2: Convert to fraction form
    15,720.42/21,694.23 = 8,647.29/x
  3. Step 3: Cross multiply
    15,720.42x = 21,694.23 × 8,647.29
  4. Step 4: Simplify right side
    15,720.42x = 187,596,298.14
  5. Step 5: Solve for x
    x = 187,596,298.14/15,720.42
  6. Step 6: Final answer
    x = 11,933.29

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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.