Home / 13,261.12-18,297.90-7,885.35

Finding the Fourth Proportional to 13,261.12, 18,297.90 and 7,885.35

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Solution

The fourth proportional to 13,261.12, 18,297.90 and 7,885.35 is: 10,880.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,261.12 : 18,297.90 = 7,885.35 : x
  2. Step 2: Convert to fraction form
    13,261.12/18,297.90 = 7,885.35/x
  3. Step 3: Cross multiply
    13,261.12x = 18,297.90 × 7,885.35
  4. Step 4: Simplify right side
    13,261.12x = 144,285,345.77
  5. Step 5: Solve for x
    x = 144,285,345.77/13,261.12
  6. Step 6: Final answer
    x = 10,880.33

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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.