Home / 7,318.40-10,977.60-2,123.60

Finding the Fourth Proportional to 7,318.40, 10,977.60 and 2,123.60

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Solution

The fourth proportional to 7,318.40, 10,977.60 and 2,123.60 is: 3,185.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,318.40 : 10,977.60 = 2,123.60 : x
  2. Step 2: Convert to fraction form
    7,318.40/10,977.60 = 2,123.60/x
  3. Step 3: Cross multiply
    7,318.40x = 10,977.60 × 2,123.60
  4. Step 4: Simplify right side
    7,318.40x = 23,312,031.36
  5. Step 5: Solve for x
    x = 23,312,031.36/7,318.40
  6. Step 6: Final answer
    x = 3,185.40

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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.