Home / 5,178.63-7,146.48-2,820.77

Finding the Fourth Proportional to 5,178.63, 7,146.48 and 2,820.77

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Solution

The fourth proportional to 5,178.63, 7,146.48 and 2,820.77 is: 3,892.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.63 : 7,146.48 = 2,820.77 : x
  2. Step 2: Convert to fraction form
    5,178.63/7,146.48 = 2,820.77/x
  3. Step 3: Cross multiply
    5,178.63x = 7,146.48 × 2,820.77
  4. Step 4: Simplify right side
    5,178.63x = 20,158,602.37
  5. Step 5: Solve for x
    x = 20,158,602.37/5,178.63
  6. Step 6: Final answer
    x = 3,892.65

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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.