Home / 6,820.72-9,412.80-4,431.28

Finding the Fourth Proportional to 6,820.72, 9,412.80 and 4,431.28

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Solution

The fourth proportional to 6,820.72, 9,412.80 and 4,431.28 is: 6,115.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,820.72 : 9,412.80 = 4,431.28 : x
  2. Step 2: Convert to fraction form
    6,820.72/9,412.80 = 4,431.28/x
  3. Step 3: Cross multiply
    6,820.72x = 9,412.80 × 4,431.28
  4. Step 4: Simplify right side
    6,820.72x = 41,710,752.38
  5. Step 5: Solve for x
    x = 41,710,752.38/6,820.72
  6. Step 6: Final answer
    x = 6,115.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.