Home / 8,428.10-12,635.55-5,140.58

Finding the Fourth Proportional to 8,428.10, 12,635.55 and 5,140.58

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Solution

The fourth proportional to 8,428.10, 12,635.55 and 5,140.58 is: 7,706.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.10 : 12,635.55 = 5,140.58 : x
  2. Step 2: Convert to fraction form
    8,428.10/12,635.55 = 5,140.58/x
  3. Step 3: Cross multiply
    8,428.10x = 12,635.55 × 5,140.58
  4. Step 4: Simplify right side
    8,428.10x = 64,954,055.62
  5. Step 5: Solve for x
    x = 64,954,055.62/8,428.10
  6. Step 6: Final answer
    x = 7,706.84

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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.