Home / 12,928.64-17,835.90-8,145.68

Finding the Fourth Proportional to 12,928.64, 17,835.90 and 8,145.68

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Solution

The fourth proportional to 12,928.64, 17,835.90 and 8,145.68 is: 11,237.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,928.64 : 17,835.90 = 8,145.68 : x
  2. Step 2: Convert to fraction form
    12,928.64/17,835.90 = 8,145.68/x
  3. Step 3: Cross multiply
    12,928.64x = 17,835.90 × 8,145.68
  4. Step 4: Simplify right side
    12,928.64x = 145,285,533.91
  5. Step 5: Solve for x
    x = 145,285,533.91/12,928.64
  6. Step 6: Final answer
    x = 11,237.50

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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.