Home / 5,486.58-7,570.80-3,128.40

Finding the Fourth Proportional to 5,486.58, 7,570.80 and 3,128.40

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Solution

The fourth proportional to 5,486.58, 7,570.80 and 3,128.40 is: 4,316.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,486.58 : 7,570.80 = 3,128.40 : x
  2. Step 2: Convert to fraction form
    5,486.58/7,570.80 = 3,128.40/x
  3. Step 3: Cross multiply
    5,486.58x = 7,570.80 × 3,128.40
  4. Step 4: Simplify right side
    5,486.58x = 23,684,490.72
  5. Step 5: Solve for x
    x = 23,684,490.72/5,486.58
  6. Step 6: Final answer
    x = 4,316.80

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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.