Home / 5,128.90-7,693.52-1,618.94

Finding the Fourth Proportional to 5,128.90, 7,693.52 and 1,618.94

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Solution

The fourth proportional to 5,128.90, 7,693.52 and 1,618.94 is: 2,428.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.90 : 7,693.52 = 1,618.94 : x
  2. Step 2: Convert to fraction form
    5,128.90/7,693.52 = 1,618.94/x
  3. Step 3: Cross multiply
    5,128.90x = 7,693.52 × 1,618.94
  4. Step 4: Simplify right side
    5,128.90x = 12,455,358.41
  5. Step 5: Solve for x
    x = 12,455,358.41/5,128.90
  6. Step 6: Final answer
    x = 2,428.47

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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.