Home / 1,518.74-2,094.56-921.09

Finding the Fourth Proportional to 1,518.74, 2,094.56 and 921.09

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Solution

The fourth proportional to 1,518.74, 2,094.56 and 921.09 is: 1,270.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.74 : 2,094.56 = 921.09 : x
  2. Step 2: Convert to fraction form
    1,518.74/2,094.56 = 921.09/x
  3. Step 3: Cross multiply
    1,518.74x = 2,094.56 × 921.09
  4. Step 4: Simplify right side
    1,518.74x = 1,929,278.27
  5. Step 5: Solve for x
    x = 1,929,278.27/1,518.74
  6. Step 6: Final answer
    x = 1,270.32

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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.