Home / 13,639.08-20,457.10-4,278.72

Finding the Fourth Proportional to 13,639.08, 20,457.10 and 4,278.72

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Solution

The fourth proportional to 13,639.08, 20,457.10 and 4,278.72 is: 6,417.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.08 : 20,457.10 = 4,278.72 : x
  2. Step 2: Convert to fraction form
    13,639.08/20,457.10 = 4,278.72/x
  3. Step 3: Cross multiply
    13,639.08x = 20,457.10 × 4,278.72
  4. Step 4: Simplify right side
    13,639.08x = 87,530,202.91
  5. Step 5: Solve for x
    x = 87,530,202.91/13,639.08
  6. Step 6: Final answer
    x = 6,417.60

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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.