Home / 4,760.86-7,143.84-1,989.40

Finding the Fourth Proportional to 4,760.86, 7,143.84 and 1,989.40

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Solution

The fourth proportional to 4,760.86, 7,143.84 and 1,989.40 is: 2,985.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,760.86 : 7,143.84 = 1,989.40 : x
  2. Step 2: Convert to fraction form
    4,760.86/7,143.84 = 1,989.40/x
  3. Step 3: Cross multiply
    4,760.86x = 7,143.84 × 1,989.40
  4. Step 4: Simplify right side
    4,760.86x = 14,211,955.30
  5. Step 5: Solve for x
    x = 14,211,955.30/4,760.86
  6. Step 6: Final answer
    x = 2,985.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.