Home / 13,500.82-18,628.32-9,921.40

Finding the Fourth Proportional to 13,500.82, 18,628.32 and 9,921.40

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Solution

The fourth proportional to 13,500.82, 18,628.32 and 9,921.40 is: 13,689.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,500.82 : 18,628.32 = 9,921.40 : x
  2. Step 2: Convert to fraction form
    13,500.82/18,628.32 = 9,921.40/x
  3. Step 3: Cross multiply
    13,500.82x = 18,628.32 × 9,921.40
  4. Step 4: Simplify right side
    13,500.82x = 184,819,014.05
  5. Step 5: Solve for x
    x = 184,819,014.05/13,500.82
  6. Step 6: Final answer
    x = 13,689.47

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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.