Home / 13,807.78-19,054.70-7,520.20

Finding the Fourth Proportional to 13,807.78, 19,054.70 and 7,520.20

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Solution

The fourth proportional to 13,807.78, 19,054.70 and 7,520.20 is: 10,377.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,807.78 : 19,054.70 = 7,520.20 : x
  2. Step 2: Convert to fraction form
    13,807.78/19,054.70 = 7,520.20/x
  3. Step 3: Cross multiply
    13,807.78x = 19,054.70 × 7,520.20
  4. Step 4: Simplify right side
    13,807.78x = 143,295,154.94
  5. Step 5: Solve for x
    x = 143,295,154.94/13,807.78
  6. Step 6: Final answer
    x = 10,377.86

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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.