Home / 13,754.13-18,979.31-7,784.76

Finding the Fourth Proportional to 13,754.13, 18,979.31 and 7,784.76

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Solution

The fourth proportional to 13,754.13, 18,979.31 and 7,784.76 is: 10,742.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,754.13 : 18,979.31 = 7,784.76 : x
  2. Step 2: Convert to fraction form
    13,754.13/18,979.31 = 7,784.76/x
  3. Step 3: Cross multiply
    13,754.13x = 18,979.31 × 7,784.76
  4. Step 4: Simplify right side
    13,754.13x = 147,749,373.32
  5. Step 5: Solve for x
    x = 147,749,373.32/13,754.13
  6. Step 6: Final answer
    x = 10,742.18

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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.