Home / 2,114.40-3,172.59-1,421.40

Finding the Fourth Proportional to 2,114.40, 3,172.59 and 1,421.40

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Solution

The fourth proportional to 2,114.40, 3,172.59 and 1,421.40 is: 2,132.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,114.40 : 3,172.59 = 1,421.40 : x
  2. Step 2: Convert to fraction form
    2,114.40/3,172.59 = 1,421.40/x
  3. Step 3: Cross multiply
    2,114.40x = 3,172.59 × 1,421.40
  4. Step 4: Simplify right side
    2,114.40x = 4,509,519.43
  5. Step 5: Solve for x
    x = 4,509,519.43/2,114.40
  6. Step 6: Final answer
    x = 2,132.77

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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.