Home / 13,815.53-19,065.43-7,847.20

Finding the Fourth Proportional to 13,815.53, 19,065.43 and 7,847.20

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Solution

The fourth proportional to 13,815.53, 19,065.43 and 7,847.20 is: 10,829.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.53 : 19,065.43 = 7,847.20 : x
  2. Step 2: Convert to fraction form
    13,815.53/19,065.43 = 7,847.20/x
  3. Step 3: Cross multiply
    13,815.53x = 19,065.43 × 7,847.20
  4. Step 4: Simplify right side
    13,815.53x = 149,610,124.55
  5. Step 5: Solve for x
    x = 149,610,124.55/13,815.53
  6. Step 6: Final answer
    x = 10,829.13

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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.