Home / 5,285.61-7,928.73-1,389.96

Finding the Fourth Proportional to 5,285.61, 7,928.73 and 1,389.96

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Solution

The fourth proportional to 5,285.61, 7,928.73 and 1,389.96 is: 2,085.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,285.61 : 7,928.73 = 1,389.96 : x
  2. Step 2: Convert to fraction form
    5,285.61/7,928.73 = 1,389.96/x
  3. Step 3: Cross multiply
    5,285.61x = 7,928.73 × 1,389.96
  4. Step 4: Simplify right side
    5,285.61x = 11,020,617.55
  5. Step 5: Solve for x
    x = 11,020,617.55/5,285.61
  6. Step 6: Final answer
    x = 2,085.02

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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.