Home / 2,153.96-2,972.79-1,315.16

Finding the Fourth Proportional to 2,153.96, 2,972.79 and 1,315.16

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Solution

The fourth proportional to 2,153.96, 2,972.79 and 1,315.16 is: 1,815.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.96 : 2,972.79 = 1,315.16 : x
  2. Step 2: Convert to fraction form
    2,153.96/2,972.79 = 1,315.16/x
  3. Step 3: Cross multiply
    2,153.96x = 2,972.79 × 1,315.16
  4. Step 4: Simplify right side
    2,153.96x = 3,909,684.56
  5. Step 5: Solve for x
    x = 3,909,684.56/2,153.96
  6. Step 6: Final answer
    x = 1,815.11

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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.