Home / 12,145.40-16,760.72-6,840.32

Finding the Fourth Proportional to 12,145.40, 16,760.72 and 6,840.32

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Solution

The fourth proportional to 12,145.40, 16,760.72 and 6,840.32 is: 9,439.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.40 : 16,760.72 = 6,840.32 : x
  2. Step 2: Convert to fraction form
    12,145.40/16,760.72 = 6,840.32/x
  3. Step 3: Cross multiply
    12,145.40x = 16,760.72 × 6,840.32
  4. Step 4: Simplify right side
    12,145.40x = 114,648,688.23
  5. Step 5: Solve for x
    x = 114,648,688.23/12,145.40
  6. Step 6: Final answer
    x = 9,439.68

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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.