Home / 6,431.38-8,864.36-5,308.72

Finding the Fourth Proportional to 6,431.38, 8,864.36 and 5,308.72

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Solution

The fourth proportional to 6,431.38, 8,864.36 and 5,308.72 is: 7,317.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,431.38 : 8,864.36 = 5,308.72 : x
  2. Step 2: Convert to fraction form
    6,431.38/8,864.36 = 5,308.72/x
  3. Step 3: Cross multiply
    6,431.38x = 8,864.36 × 5,308.72
  4. Step 4: Simplify right side
    6,431.38x = 47,058,405.22
  5. Step 5: Solve for x
    x = 47,058,405.22/6,431.38
  6. Step 6: Final answer
    x = 7,317.00

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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.