Home / 8,945.80-12,343.36-5,409.20

Finding the Fourth Proportional to 8,945.80, 12,343.36 and 5,409.20

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Solution

The fourth proportional to 8,945.80, 12,343.36 and 5,409.20 is: 7,463.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,945.80 : 12,343.36 = 5,409.20 : x
  2. Step 2: Convert to fraction form
    8,945.80/12,343.36 = 5,409.20/x
  3. Step 3: Cross multiply
    8,945.80x = 12,343.36 × 5,409.20
  4. Step 4: Simplify right side
    8,945.80x = 66,767,702.91
  5. Step 5: Solve for x
    x = 66,767,702.91/8,945.80
  6. Step 6: Final answer
    x = 7,463.58

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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.