Home / 7,148.60-9,865.20-4,004.78

Finding the Fourth Proportional to 7,148.60, 9,865.20 and 4,004.78

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Solution

The fourth proportional to 7,148.60, 9,865.20 and 4,004.78 is: 5,526.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,148.60 : 9,865.20 = 4,004.78 : x
  2. Step 2: Convert to fraction form
    7,148.60/9,865.20 = 4,004.78/x
  3. Step 3: Cross multiply
    7,148.60x = 9,865.20 × 4,004.78
  4. Step 4: Simplify right side
    7,148.60x = 39,507,955.66
  5. Step 5: Solve for x
    x = 39,507,955.66/7,148.60
  6. Step 6: Final answer
    x = 5,526.67

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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.