Home / 8,636.21-12,886.95-7,705.36

Finding the Fourth Proportional to 8,636.21, 12,886.95 and 7,705.36

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Solution

The fourth proportional to 8,636.21, 12,886.95 and 7,705.36 is: 11,497.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,636.21 : 12,886.95 = 7,705.36 : x
  2. Step 2: Convert to fraction form
    8,636.21/12,886.95 = 7,705.36/x
  3. Step 3: Cross multiply
    8,636.21x = 12,886.95 × 7,705.36
  4. Step 4: Simplify right side
    8,636.21x = 99,298,556.83
  5. Step 5: Solve for x
    x = 99,298,556.83/8,636.21
  6. Step 6: Final answer
    x = 11,497.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.