Home / 2,173.69-3,000.15-1,387.60

Finding the Fourth Proportional to 2,173.69, 3,000.15 and 1,387.60

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Solution

The fourth proportional to 2,173.69, 3,000.15 and 1,387.60 is: 1,915.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,173.69 : 3,000.15 = 1,387.60 : x
  2. Step 2: Convert to fraction form
    2,173.69/3,000.15 = 1,387.60/x
  3. Step 3: Cross multiply
    2,173.69x = 3,000.15 × 1,387.60
  4. Step 4: Simplify right side
    2,173.69x = 4,163,008.14
  5. Step 5: Solve for x
    x = 4,163,008.14/2,173.69
  6. Step 6: Final answer
    x = 1,915.18

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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.