Home / 28,357.97-39,128.06-16,420.59

Finding the Fourth Proportional to 28,357.97, 39,128.06 and 16,420.59

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Solution

The fourth proportional to 28,357.97, 39,128.06 and 16,420.59 is: 22,656.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,357.97 : 39,128.06 = 16,420.59 : x
  2. Step 2: Convert to fraction form
    28,357.97/39,128.06 = 16,420.59/x
  3. Step 3: Cross multiply
    28,357.97x = 39,128.06 × 16,420.59
  4. Step 4: Simplify right side
    28,357.97x = 642,505,871.81
  5. Step 5: Solve for x
    x = 642,505,871.81/28,357.97
  6. Step 6: Final answer
    x = 22,656.98

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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.