Home / 5,386.51-8,079.77-1,689.06

Finding the Fourth Proportional to 5,386.51, 8,079.77 and 1,689.06

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Solution

The fourth proportional to 5,386.51, 8,079.77 and 1,689.06 is: 2,533.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,386.51 : 8,079.77 = 1,689.06 : x
  2. Step 2: Convert to fraction form
    5,386.51/8,079.77 = 1,689.06/x
  3. Step 3: Cross multiply
    5,386.51x = 8,079.77 × 1,689.06
  4. Step 4: Simplify right side
    5,386.51x = 13,647,241.34
  5. Step 5: Solve for x
    x = 13,647,241.34/5,386.51
  6. Step 6: Final answer
    x = 2,533.60

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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.