Home / 3,915.05-5,870.65-1,938.40

Finding the Fourth Proportional to 3,915.05, 5,870.65 and 1,938.40

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Solution

The fourth proportional to 3,915.05, 5,870.65 and 1,938.40 is: 2,906.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.05 : 5,870.65 = 1,938.40 : x
  2. Step 2: Convert to fraction form
    3,915.05/5,870.65 = 1,938.40/x
  3. Step 3: Cross multiply
    3,915.05x = 5,870.65 × 1,938.40
  4. Step 4: Simplify right side
    3,915.05x = 11,379,667.96
  5. Step 5: Solve for x
    x = 11,379,667.96/3,915.05
  6. Step 6: Final answer
    x = 2,906.65

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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.