Home / 12,905.70-19,342.35-9,438.90

Finding the Fourth Proportional to 12,905.70, 19,342.35 and 9,438.90

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Solution

The fourth proportional to 12,905.70, 19,342.35 and 9,438.90 is: 14,146.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.70 : 19,342.35 = 9,438.90 : x
  2. Step 2: Convert to fraction form
    12,905.70/19,342.35 = 9,438.90/x
  3. Step 3: Cross multiply
    12,905.70x = 19,342.35 × 9,438.90
  4. Step 4: Simplify right side
    12,905.70x = 182,570,507.42
  5. Step 5: Solve for x
    x = 182,570,507.42/12,905.70
  6. Step 6: Final answer
    x = 14,146.50

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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.