Home / 13,245.12-18,278.18-7,939.94

Finding the Fourth Proportional to 13,245.12, 18,278.18 and 7,939.94

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Solution

The fourth proportional to 13,245.12, 18,278.18 and 7,939.94 is: 10,957.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,245.12 : 18,278.18 = 7,939.94 : x
  2. Step 2: Convert to fraction form
    13,245.12/18,278.18 = 7,939.94/x
  3. Step 3: Cross multiply
    13,245.12x = 18,278.18 × 7,939.94
  4. Step 4: Simplify right side
    13,245.12x = 145,127,652.51
  5. Step 5: Solve for x
    x = 145,127,652.51/13,245.12
  6. Step 6: Final answer
    x = 10,957.07

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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.