Home / 5,407.28-8,109.84-1,511.72

Finding the Fourth Proportional to 5,407.28, 8,109.84 and 1,511.72

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Solution

The fourth proportional to 5,407.28, 8,109.84 and 1,511.72 is: 2,267.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,407.28 : 8,109.84 = 1,511.72 : x
  2. Step 2: Convert to fraction form
    5,407.28/8,109.84 = 1,511.72/x
  3. Step 3: Cross multiply
    5,407.28x = 8,109.84 × 1,511.72
  4. Step 4: Simplify right side
    5,407.28x = 12,259,807.32
  5. Step 5: Solve for x
    x = 12,259,807.32/5,407.28
  6. Step 6: Final answer
    x = 2,267.28

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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.