Home / 28,109.15-38,790.66-15,533.90

Finding the Fourth Proportional to 28,109.15, 38,790.66 and 15,533.90

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Solution

The fourth proportional to 28,109.15, 38,790.66 and 15,533.90 is: 21,436.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,109.15 : 38,790.66 = 15,533.90 : x
  2. Step 2: Convert to fraction form
    28,109.15/38,790.66 = 15,533.90/x
  3. Step 3: Cross multiply
    28,109.15x = 38,790.66 × 15,533.90
  4. Step 4: Simplify right side
    28,109.15x = 602,570,233.37
  5. Step 5: Solve for x
    x = 602,570,233.37/28,109.15
  6. Step 6: Final answer
    x = 21,436.80

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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.