Home / 12,139.24-16,748.26-7,170.28

Finding the Fourth Proportional to 12,139.24, 16,748.26 and 7,170.28

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Solution

The fourth proportional to 12,139.24, 16,748.26 and 7,170.28 is: 9,892.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.24 : 16,748.26 = 7,170.28 : x
  2. Step 2: Convert to fraction form
    12,139.24/16,748.26 = 7,170.28/x
  3. Step 3: Cross multiply
    12,139.24x = 16,748.26 × 7,170.28
  4. Step 4: Simplify right side
    12,139.24x = 120,089,713.71
  5. Step 5: Solve for x
    x = 120,089,713.71/12,139.24
  6. Step 6: Final answer
    x = 9,892.69

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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.