Home / 8,945.85-12,346.40-5,409.05

Finding the Fourth Proportional to 8,945.85, 12,346.40 and 5,409.05

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Solution

The fourth proportional to 8,945.85, 12,346.40 and 5,409.05 is: 7,465.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,945.85 : 12,346.40 = 5,409.05 : x
  2. Step 2: Convert to fraction form
    8,945.85/12,346.40 = 5,409.05/x
  3. Step 3: Cross multiply
    8,945.85x = 12,346.40 × 5,409.05
  4. Step 4: Simplify right side
    8,945.85x = 66,782,264.05
  5. Step 5: Solve for x
    x = 66,782,264.05/8,945.85
  6. Step 6: Final answer
    x = 7,465.17

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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.