Home / 13,412.85-18,501.32-8,639.03

Finding the Fourth Proportional to 13,412.85, 18,501.32 and 8,639.03

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Solution

The fourth proportional to 13,412.85, 18,501.32 and 8,639.03 is: 11,916.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,412.85 : 18,501.32 = 8,639.03 : x
  2. Step 2: Convert to fraction form
    13,412.85/18,501.32 = 8,639.03/x
  3. Step 3: Cross multiply
    13,412.85x = 18,501.32 × 8,639.03
  4. Step 4: Simplify right side
    13,412.85x = 159,833,322.82
  5. Step 5: Solve for x
    x = 159,833,322.82/13,412.85
  6. Step 6: Final answer
    x = 11,916.43

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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.