Home / 2,139.84-2,954.08-1,312.32

Finding the Fourth Proportional to 2,139.84, 2,954.08 and 1,312.32

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Solution

The fourth proportional to 2,139.84, 2,954.08 and 1,312.32 is: 1,811.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.84 : 2,954.08 = 1,312.32 : x
  2. Step 2: Convert to fraction form
    2,139.84/2,954.08 = 1,312.32/x
  3. Step 3: Cross multiply
    2,139.84x = 2,954.08 × 1,312.32
  4. Step 4: Simplify right side
    2,139.84x = 3,876,698.27
  5. Step 5: Solve for x
    x = 3,876,698.27/2,139.84
  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.