Home / 3,128.59-4,316.68-1,916.93

Finding the Fourth Proportional to 3,128.59, 4,316.68 and 1,916.93

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Solution

The fourth proportional to 3,128.59, 4,316.68 and 1,916.93 is: 2,644.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.59 : 4,316.68 = 1,916.93 : x
  2. Step 2: Convert to fraction form
    3,128.59/4,316.68 = 1,916.93/x
  3. Step 3: Cross multiply
    3,128.59x = 4,316.68 × 1,916.93
  4. Step 4: Simplify right side
    3,128.59x = 8,274,778.18
  5. Step 5: Solve for x
    x = 8,274,778.18/3,128.59
  6. Step 6: Final answer
    x = 2,644.89

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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.