Home / 5,315.60-7,975.10-1,618.54

Finding the Fourth Proportional to 5,315.60, 7,975.10 and 1,618.54

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Solution

The fourth proportional to 5,315.60, 7,975.10 and 1,618.54 is: 2,428.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,315.60 : 7,975.10 = 1,618.54 : x
  2. Step 2: Convert to fraction form
    5,315.60/7,975.10 = 1,618.54/x
  3. Step 3: Cross multiply
    5,315.60x = 7,975.10 × 1,618.54
  4. Step 4: Simplify right side
    5,315.60x = 12,908,018.35
  5. Step 5: Solve for x
    x = 12,908,018.35/5,315.60
  6. Step 6: Final answer
    x = 2,428.33

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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.