Home / 13,790.40-19,039.20-8,492.39

Finding the Fourth Proportional to 13,790.40, 19,039.20 and 8,492.39

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Solution

The fourth proportional to 13,790.40, 19,039.20 and 8,492.39 is: 11,724.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,790.40 : 19,039.20 = 8,492.39 : x
  2. Step 2: Convert to fraction form
    13,790.40/19,039.20 = 8,492.39/x
  3. Step 3: Cross multiply
    13,790.40x = 19,039.20 × 8,492.39
  4. Step 4: Simplify right side
    13,790.40x = 161,688,410.91
  5. Step 5: Solve for x
    x = 161,688,410.91/13,790.40
  6. Step 6: Final answer
    x = 11,724.71

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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.