Home / 19,015.40-28,507.70-7,930.40

Finding the Fourth Proportional to 19,015.40, 28,507.70 and 7,930.40

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Solution

The fourth proportional to 19,015.40, 28,507.70 and 7,930.40 is: 11,889.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,015.40 : 28,507.70 = 7,930.40 : x
  2. Step 2: Convert to fraction form
    19,015.40/28,507.70 = 7,930.40/x
  3. Step 3: Cross multiply
    19,015.40x = 28,507.70 × 7,930.40
  4. Step 4: Simplify right side
    19,015.40x = 226,077,464.08
  5. Step 5: Solve for x
    x = 226,077,464.08/19,015.40
  6. Step 6: Final answer
    x = 11,889.18

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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.