Home / 28,379.19-39,163.28-15,803.94

Finding the Fourth Proportional to 28,379.19, 39,163.28 and 15,803.94

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Solution

The fourth proportional to 28,379.19, 39,163.28 and 15,803.94 is: 21,809.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,379.19 : 39,163.28 = 15,803.94 : x
  2. Step 2: Convert to fraction form
    28,379.19/39,163.28 = 15,803.94/x
  3. Step 3: Cross multiply
    28,379.19x = 39,163.28 × 15,803.94
  4. Step 4: Simplify right side
    28,379.19x = 618,934,127.32
  5. Step 5: Solve for x
    x = 618,934,127.32/28,379.19
  6. Step 6: Final answer
    x = 21,809.44

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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.