Home / 13,148.61-18,142.70-7,771.95

Finding the Fourth Proportional to 13,148.61, 18,142.70 and 7,771.95

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Solution

The fourth proportional to 13,148.61, 18,142.70 and 7,771.95 is: 10,723.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,148.61 : 18,142.70 = 7,771.95 : x
  2. Step 2: Convert to fraction form
    13,148.61/18,142.70 = 7,771.95/x
  3. Step 3: Cross multiply
    13,148.61x = 18,142.70 × 7,771.95
  4. Step 4: Simplify right side
    13,148.61x = 141,004,157.27
  5. Step 5: Solve for x
    x = 141,004,157.27/13,148.61
  6. Step 6: Final answer
    x = 10,723.88

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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.