Home / 18,915.53-28,376.73-7,816.19

Finding the Fourth Proportional to 18,915.53, 28,376.73 and 7,816.19

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Solution

The fourth proportional to 18,915.53, 28,376.73 and 7,816.19 is: 11,725.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,915.53 : 28,376.73 = 7,816.19 : x
  2. Step 2: Convert to fraction form
    18,915.53/28,376.73 = 7,816.19/x
  3. Step 3: Cross multiply
    18,915.53x = 28,376.73 × 7,816.19
  4. Step 4: Simplify right side
    18,915.53x = 221,797,771.38
  5. Step 5: Solve for x
    x = 221,797,771.38/18,915.53
  6. Step 6: Final answer
    x = 11,725.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.