Home / 20,939.84-28,895.88-11,506.58

Finding the Fourth Proportional to 20,939.84, 28,895.88 and 11,506.58

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Solution

The fourth proportional to 20,939.84, 28,895.88 and 11,506.58 is: 15,878.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.84 : 28,895.88 = 11,506.58 : x
  2. Step 2: Convert to fraction form
    20,939.84/28,895.88 = 11,506.58/x
  3. Step 3: Cross multiply
    20,939.84x = 28,895.88 × 11,506.58
  4. Step 4: Simplify right side
    20,939.84x = 332,492,754.89
  5. Step 5: Solve for x
    x = 332,492,754.89/20,939.84
  6. Step 6: Final answer
    x = 15,878.48

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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.