Home / 13,680.24-20,519.40-7,818.48

Finding the Fourth Proportional to 13,680.24, 20,519.40 and 7,818.48

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Solution

The fourth proportional to 13,680.24, 20,519.40 and 7,818.48 is: 11,727.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.24 : 20,519.40 = 7,818.48 : x
  2. Step 2: Convert to fraction form
    13,680.24/20,519.40 = 7,818.48/x
  3. Step 3: Cross multiply
    13,680.24x = 20,519.40 × 7,818.48
  4. Step 4: Simplify right side
    13,680.24x = 160,430,518.51
  5. Step 5: Solve for x
    x = 160,430,518.51/13,680.24
  6. Step 6: Final answer
    x = 11,727.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.