Home / 2,122.60-2,929.68-1,415.56

Finding the Fourth Proportional to 2,122.60, 2,929.68 and 1,415.56

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Solution

The fourth proportional to 2,122.60, 2,929.68 and 1,415.56 is: 1,953.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.60 : 2,929.68 = 1,415.56 : x
  2. Step 2: Convert to fraction form
    2,122.60/2,929.68 = 1,415.56/x
  3. Step 3: Cross multiply
    2,122.60x = 2,929.68 × 1,415.56
  4. Step 4: Simplify right side
    2,122.60x = 4,147,137.82
  5. Step 5: Solve for x
    x = 4,147,137.82/2,122.60
  6. Step 6: Final answer
    x = 1,953.80

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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.