Home / 2,136.79-2,948.61-1,392.18

Finding the Fourth Proportional to 2,136.79, 2,948.61 and 1,392.18

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Solution

The fourth proportional to 2,136.79, 2,948.61 and 1,392.18 is: 1,921.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,136.79 : 2,948.61 = 1,392.18 : x
  2. Step 2: Convert to fraction form
    2,136.79/2,948.61 = 1,392.18/x
  3. Step 3: Cross multiply
    2,136.79x = 2,948.61 × 1,392.18
  4. Step 4: Simplify right side
    2,136.79x = 4,104,995.87
  5. Step 5: Solve for x
    x = 4,104,995.87/2,136.79
  6. Step 6: Final answer
    x = 1,921.10

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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.