Home / 2,153.12-2,970.64-1,313.44

Finding the Fourth Proportional to 2,153.12, 2,970.64 and 1,313.44

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Solution

The fourth proportional to 2,153.12, 2,970.64 and 1,313.44 is: 1,812.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.12 : 2,970.64 = 1,313.44 : x
  2. Step 2: Convert to fraction form
    2,153.12/2,970.64 = 1,313.44/x
  3. Step 3: Cross multiply
    2,153.12x = 2,970.64 × 1,313.44
  4. Step 4: Simplify right side
    2,153.12x = 3,901,757.40
  5. Step 5: Solve for x
    x = 3,901,757.40/2,153.12
  6. Step 6: Final answer
    x = 1,812.14

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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.