Home / 28,764.12-39,608.64-28,109.12

Finding the Fourth Proportional to 28,764.12, 39,608.64 and 28,109.12

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Solution

The fourth proportional to 28,764.12, 39,608.64 and 28,109.12 is: 38,706.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,764.12 : 39,608.64 = 28,109.12 : x
  2. Step 2: Convert to fraction form
    28,764.12/39,608.64 = 28,109.12/x
  3. Step 3: Cross multiply
    28,764.12x = 39,608.64 × 28,109.12
  4. Step 4: Simplify right side
    28,764.12x = 1,113,364,014.80
  5. Step 5: Solve for x
    x = 1,113,364,014.80/28,764.12
  6. Step 6: Final answer
    x = 38,706.69

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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.