Home / 7,130.50-10,688.64-3,431.68

Finding the Fourth Proportional to 7,130.50, 10,688.64 and 3,431.68

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Solution

The fourth proportional to 7,130.50, 10,688.64 and 3,431.68 is: 5,144.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,130.50 : 10,688.64 = 3,431.68 : x
  2. Step 2: Convert to fraction form
    7,130.50/10,688.64 = 3,431.68/x
  3. Step 3: Cross multiply
    7,130.50x = 10,688.64 × 3,431.68
  4. Step 4: Simplify right side
    7,130.50x = 36,679,992.12
  5. Step 5: Solve for x
    x = 36,679,992.12/7,130.50
  6. Step 6: Final answer
    x = 5,144.10

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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.