Home / 28,509-39,343.26-15,933.78

Finding the Fourth Proportional to 28,509, 39,343.26 and 15,933.78

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Solution

The fourth proportional to 28,509, 39,343.26 and 15,933.78 is: 21,989.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,509 : 39,343.26 = 15,933.78 : x
  2. Step 2: Convert to fraction form
    28,509/39,343.26 = 15,933.78/x
  3. Step 3: Cross multiply
    28,509x = 39,343.26 × 15,933.78
  4. Step 4: Simplify right side
    28,509x = 626,886,849.32
  5. Step 5: Solve for x
    x = 626,886,849.32/28,509
  6. Step 6: Final answer
    x = 21,989.09

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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.