Home / 1,513.62-2,087.78-923.13

Finding the Fourth Proportional to 1,513.62, 2,087.78 and 923.13

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Solution

The fourth proportional to 1,513.62, 2,087.78 and 923.13 is: 1,273.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,513.62 : 2,087.78 = 923.13 : x
  2. Step 2: Convert to fraction form
    1,513.62/2,087.78 = 923.13/x
  3. Step 3: Cross multiply
    1,513.62x = 2,087.78 × 923.13
  4. Step 4: Simplify right side
    1,513.62x = 1,927,287.74
  5. Step 5: Solve for x
    x = 1,927,287.74/1,513.62
  6. Step 6: Final answer
    x = 1,273.30

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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.