Home / 7,485.40-11,228.10-4,715.20

Finding the Fourth Proportional to 7,485.40, 11,228.10 and 4,715.20

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Solution

The fourth proportional to 7,485.40, 11,228.10 and 4,715.20 is: 7,072.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,485.40 : 11,228.10 = 4,715.20 : x
  2. Step 2: Convert to fraction form
    7,485.40/11,228.10 = 4,715.20/x
  3. Step 3: Cross multiply
    7,485.40x = 11,228.10 × 4,715.20
  4. Step 4: Simplify right side
    7,485.40x = 52,942,737.12
  5. Step 5: Solve for x
    x = 52,942,737.12/7,485.40
  6. Step 6: Final answer
    x = 7,072.80

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Similar ratio
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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.