Home / 10,420.16-14,379.36-5,704.64

Finding the Fourth Proportional to 10,420.16, 14,379.36 and 5,704.64

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Solution

The fourth proportional to 10,420.16, 14,379.36 and 5,704.64 is: 7,872.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,420.16 : 14,379.36 = 5,704.64 : x
  2. Step 2: Convert to fraction form
    10,420.16/14,379.36 = 5,704.64/x
  3. Step 3: Cross multiply
    10,420.16x = 14,379.36 × 5,704.64
  4. Step 4: Simplify right side
    10,420.16x = 82,029,072.23
  5. Step 5: Solve for x
    x = 82,029,072.23/10,420.16
  6. Step 6: Final answer
    x = 7,872.15

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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.