Home / 9,278.40-13,903.20-7,809.60

Finding the Fourth Proportional to 9,278.40, 13,903.20 and 7,809.60

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Solution

The fourth proportional to 9,278.40, 13,903.20 and 7,809.60 is: 11,702.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,278.40 : 13,903.20 = 7,809.60 : x
  2. Step 2: Convert to fraction form
    9,278.40/13,903.20 = 7,809.60/x
  3. Step 3: Cross multiply
    9,278.40x = 13,903.20 × 7,809.60
  4. Step 4: Simplify right side
    9,278.40x = 108,578,430.72
  5. Step 5: Solve for x
    x = 108,578,430.72/9,278.40
  6. Step 6: Final answer
    x = 11,702.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.