Home / 5,128.98-7,693.53-1,431.12

Finding the Fourth Proportional to 5,128.98, 7,693.53 and 1,431.12

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Solution

The fourth proportional to 5,128.98, 7,693.53 and 1,431.12 is: 2,146.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.98 : 7,693.53 = 1,431.12 : x
  2. Step 2: Convert to fraction form
    5,128.98/7,693.53 = 1,431.12/x
  3. Step 3: Cross multiply
    5,128.98x = 7,693.53 × 1,431.12
  4. Step 4: Simplify right side
    5,128.98x = 11,010,364.65
  5. Step 5: Solve for x
    x = 11,010,364.65/5,128.98
  6. Step 6: Final answer
    x = 2,146.70

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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.