Home / 4,210.60-6,312.64-2,128.92

Finding the Fourth Proportional to 4,210.60, 6,312.64 and 2,128.92

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Solution

The fourth proportional to 4,210.60, 6,312.64 and 2,128.92 is: 3,191.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,210.60 : 6,312.64 = 2,128.92 : x
  2. Step 2: Convert to fraction form
    4,210.60/6,312.64 = 2,128.92/x
  3. Step 3: Cross multiply
    4,210.60x = 6,312.64 × 2,128.92
  4. Step 4: Simplify right side
    4,210.60x = 13,439,105.55
  5. Step 5: Solve for x
    x = 13,439,105.55/4,210.60
  6. Step 6: Final answer
    x = 3,191.73

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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.