Home / 9,116.80-12,579.60-5,137.60

Finding the Fourth Proportional to 9,116.80, 12,579.60 and 5,137.60

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Solution

The fourth proportional to 9,116.80, 12,579.60 and 5,137.60 is: 7,089.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,116.80 : 12,579.60 = 5,137.60 : x
  2. Step 2: Convert to fraction form
    9,116.80/12,579.60 = 5,137.60/x
  3. Step 3: Cross multiply
    9,116.80x = 12,579.60 × 5,137.60
  4. Step 4: Simplify right side
    9,116.80x = 64,628,952.96
  5. Step 5: Solve for x
    x = 64,628,952.96/9,116.80
  6. Step 6: Final answer
    x = 7,089.00

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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.