Home / 8,639.66-12,983.87-5,130.28

Finding the Fourth Proportional to 8,639.66, 12,983.87 and 5,130.28

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Solution

The fourth proportional to 8,639.66, 12,983.87 and 5,130.28 is: 7,709.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.66 : 12,983.87 = 5,130.28 : x
  2. Step 2: Convert to fraction form
    8,639.66/12,983.87 = 5,130.28/x
  3. Step 3: Cross multiply
    8,639.66x = 12,983.87 × 5,130.28
  4. Step 4: Simplify right side
    8,639.66x = 66,610,798.01
  5. Step 5: Solve for x
    x = 66,610,798.01/8,639.66
  6. Step 6: Final answer
    x = 7,709.89

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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.