Home / 15,535.42-21,438.94-8,821.19

Finding the Fourth Proportional to 15,535.42, 21,438.94 and 8,821.19

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Solution

The fourth proportional to 15,535.42, 21,438.94 and 8,821.19 is: 12,173.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,535.42 : 21,438.94 = 8,821.19 : x
  2. Step 2: Convert to fraction form
    15,535.42/21,438.94 = 8,821.19/x
  3. Step 3: Cross multiply
    15,535.42x = 21,438.94 × 8,821.19
  4. Step 4: Simplify right side
    15,535.42x = 189,116,963.14
  5. Step 5: Solve for x
    x = 189,116,963.14/15,535.42
  6. Step 6: Final answer
    x = 12,173.28

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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.