Home / 28,810.76-39,769.86-19,406.12

Finding the Fourth Proportional to 28,810.76, 39,769.86 and 19,406.12

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Solution

The fourth proportional to 28,810.76, 39,769.86 and 19,406.12 is: 26,787.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,810.76 : 39,769.86 = 19,406.12 : x
  2. Step 2: Convert to fraction form
    28,810.76/39,769.86 = 19,406.12/x
  3. Step 3: Cross multiply
    28,810.76x = 39,769.86 × 19,406.12
  4. Step 4: Simplify right side
    28,810.76x = 771,778,675.54
  5. Step 5: Solve for x
    x = 771,778,675.54/28,810.76
  6. Step 6: Final answer
    x = 26,787.86

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Double scale
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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.