Home / 5,386.80-8,080.31-1,688.95

Finding the Fourth Proportional to 5,386.80, 8,080.31 and 1,688.95

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Solution

The fourth proportional to 5,386.80, 8,080.31 and 1,688.95 is: 2,533.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,386.80 : 8,080.31 = 1,688.95 : x
  2. Step 2: Convert to fraction form
    5,386.80/8,080.31 = 1,688.95/x
  3. Step 3: Cross multiply
    5,386.80x = 8,080.31 × 1,688.95
  4. Step 4: Simplify right side
    5,386.80x = 13,647,239.57
  5. Step 5: Solve for x
    x = 13,647,239.57/5,386.80
  6. Step 6: Final answer
    x = 2,533.46

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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.