Home / 12,945.81-19,387.58-7,382.29

Finding the Fourth Proportional to 12,945.81, 19,387.58 and 7,382.29

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Solution

The fourth proportional to 12,945.81, 19,387.58 and 7,382.29 is: 11,055.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,945.81 : 19,387.58 = 7,382.29 : x
  2. Step 2: Convert to fraction form
    12,945.81/19,387.58 = 7,382.29/x
  3. Step 3: Cross multiply
    12,945.81x = 19,387.58 × 7,382.29
  4. Step 4: Simplify right side
    12,945.81x = 143,124,688.93
  5. Step 5: Solve for x
    x = 143,124,688.93/12,945.81
  6. Step 6: Final answer
    x = 11,055.67

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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.