Home / 5,639.56-8,457.75-1,690.64

Finding the Fourth Proportional to 5,639.56, 8,457.75 and 1,690.64

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Solution

The fourth proportional to 5,639.56, 8,457.75 and 1,690.64 is: 2,535.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,639.56 : 8,457.75 = 1,690.64 : x
  2. Step 2: Convert to fraction form
    5,639.56/8,457.75 = 1,690.64/x
  3. Step 3: Cross multiply
    5,639.56x = 8,457.75 × 1,690.64
  4. Step 4: Simplify right side
    5,639.56x = 14,298,999.89
  5. Step 5: Solve for x
    x = 14,298,999.89/5,639.56
  6. Step 6: Final answer
    x = 2,535.48

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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.