Home / 28,209.86-38,928.16-16,272.48

Finding the Fourth Proportional to 28,209.86, 38,928.16 and 16,272.48

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Solution

The fourth proportional to 28,209.86, 38,928.16 and 16,272.48 is: 22,455.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,209.86 : 38,928.16 = 16,272.48 : x
  2. Step 2: Convert to fraction form
    28,209.86/38,928.16 = 16,272.48/x
  3. Step 3: Cross multiply
    28,209.86x = 38,928.16 × 16,272.48
  4. Step 4: Simplify right side
    28,209.86x = 633,457,705.04
  5. Step 5: Solve for x
    x = 633,457,705.04/28,209.86
  6. Step 6: Final answer
    x = 22,455.19

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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.