Home / 12,364.80-18,536.40-7,429.20

Finding the Fourth Proportional to 12,364.80, 18,536.40 and 7,429.20

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Solution

The fourth proportional to 12,364.80, 18,536.40 and 7,429.20 is: 11,137.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,364.80 : 18,536.40 = 7,429.20 : x
  2. Step 2: Convert to fraction form
    12,364.80/18,536.40 = 7,429.20/x
  3. Step 3: Cross multiply
    12,364.80x = 18,536.40 × 7,429.20
  4. Step 4: Simplify right side
    12,364.80x = 137,710,622.88
  5. Step 5: Solve for x
    x = 137,710,622.88/12,364.80
  6. Step 6: Final answer
    x = 11,137.31

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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.