Home / 2,121.16-2,925.85-1,313.42

Finding the Fourth Proportional to 2,121.16, 2,925.85 and 1,313.42

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Solution

The fourth proportional to 2,121.16, 2,925.85 and 1,313.42 is: 1,811.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.16 : 2,925.85 = 1,313.42 : x
  2. Step 2: Convert to fraction form
    2,121.16/2,925.85 = 1,313.42/x
  3. Step 3: Cross multiply
    2,121.16x = 2,925.85 × 1,313.42
  4. Step 4: Simplify right side
    2,121.16x = 3,842,859.07
  5. Step 5: Solve for x
    x = 3,842,859.07/2,121.16
  6. Step 6: Final answer
    x = 1,811.68

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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.