Home / 28,778.40-39,698.64-19,810.08

Finding the Fourth Proportional to 28,778.40, 39,698.64 and 19,810.08

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Solution

The fourth proportional to 28,778.40, 39,698.64 and 19,810.08 is: 27,327.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,778.40 : 39,698.64 = 19,810.08 : x
  2. Step 2: Convert to fraction form
    28,778.40/39,698.64 = 19,810.08/x
  3. Step 3: Cross multiply
    28,778.40x = 39,698.64 × 19,810.08
  4. Step 4: Simplify right side
    28,778.40x = 786,433,234.29
  5. Step 5: Solve for x
    x = 786,433,234.29/28,778.40
  6. Step 6: Final answer
    x = 27,327.20

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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.