Home / 5,386.64-8,079.36-1,689.08

Finding the Fourth Proportional to 5,386.64, 8,079.36 and 1,689.08

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Solution

The fourth proportional to 5,386.64, 8,079.36 and 1,689.08 is: 2,533.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,386.64 : 8,079.36 = 1,689.08 : x
  2. Step 2: Convert to fraction form
    5,386.64/8,079.36 = 1,689.08/x
  3. Step 3: Cross multiply
    5,386.64x = 8,079.36 × 1,689.08
  4. Step 4: Simplify right side
    5,386.64x = 13,646,685.39
  5. Step 5: Solve for x
    x = 13,646,685.39/5,386.64
  6. Step 6: Final answer
    x = 2,533.43

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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.