Home / 28,380.74-39,124.50-19,856.45

Finding the Fourth Proportional to 28,380.74, 39,124.50 and 19,856.45

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Solution

The fourth proportional to 28,380.74, 39,124.50 and 19,856.45 is: 27,373.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.74 : 39,124.50 = 19,856.45 : x
  2. Step 2: Convert to fraction form
    28,380.74/39,124.50 = 19,856.45/x
  3. Step 3: Cross multiply
    28,380.74x = 39,124.50 × 19,856.45
  4. Step 4: Simplify right side
    28,380.74x = 776,873,678.03
  5. Step 5: Solve for x
    x = 776,873,678.03/28,380.74
  6. Step 6: Final answer
    x = 27,373.27

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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.