Home / 15,822.20-21,790.16-15,477.72

Finding the Fourth Proportional to 15,822.20, 21,790.16 and 15,477.72

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Solution

The fourth proportional to 15,822.20, 21,790.16 and 15,477.72 is: 21,315.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,822.20 : 21,790.16 = 15,477.72 : x
  2. Step 2: Convert to fraction form
    15,822.20/21,790.16 = 15,477.72/x
  3. Step 3: Cross multiply
    15,822.20x = 21,790.16 × 15,477.72
  4. Step 4: Simplify right side
    15,822.20x = 337,261,995.24
  5. Step 5: Solve for x
    x = 337,261,995.24/15,822.20
  6. Step 6: Final answer
    x = 21,315.75

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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.