Home / 2,914.80-4,023.84-1,971.12

Finding the Fourth Proportional to 2,914.80, 4,023.84 and 1,971.12

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Solution

The fourth proportional to 2,914.80, 4,023.84 and 1,971.12 is: 2,721.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,914.80 : 4,023.84 = 1,971.12 : x
  2. Step 2: Convert to fraction form
    2,914.80/4,023.84 = 1,971.12/x
  3. Step 3: Cross multiply
    2,914.80x = 4,023.84 × 1,971.12
  4. Step 4: Simplify right side
    2,914.80x = 7,931,471.50
  5. Step 5: Solve for x
    x = 7,931,471.50/2,914.80
  6. Step 6: Final answer
    x = 2,721.10

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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.