Home / 2,875.83-3,964.90-2,168.70

Finding the Fourth Proportional to 2,875.83, 3,964.90 and 2,168.70

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Solution

The fourth proportional to 2,875.83, 3,964.90 and 2,168.70 is: 2,989.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,875.83 : 3,964.90 = 2,168.70 : x
  2. Step 2: Convert to fraction form
    2,875.83/3,964.90 = 2,168.70/x
  3. Step 3: Cross multiply
    2,875.83x = 3,964.90 × 2,168.70
  4. Step 4: Simplify right side
    2,875.83x = 8,598,678.63
  5. Step 5: Solve for x
    x = 8,598,678.63/2,875.83
  6. Step 6: Final answer
    x = 2,989.98

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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.