Home / 5,431.60-8,139.30-4,605.40

Finding the Fourth Proportional to 5,431.60, 8,139.30 and 4,605.40

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Solution

The fourth proportional to 5,431.60, 8,139.30 and 4,605.40 is: 6,901.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.60 : 8,139.30 = 4,605.40 : x
  2. Step 2: Convert to fraction form
    5,431.60/8,139.30 = 4,605.40/x
  3. Step 3: Cross multiply
    5,431.60x = 8,139.30 × 4,605.40
  4. Step 4: Simplify right side
    5,431.60x = 37,484,732.22
  5. Step 5: Solve for x
    x = 37,484,732.22/5,431.60
  6. Step 6: Final answer
    x = 6,901.23

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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.