Home / 28,383.89-39,154.90-21,657.86

Finding the Fourth Proportional to 28,383.89, 39,154.90 and 21,657.86

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Solution

The fourth proportional to 28,383.89, 39,154.90 and 21,657.86 is: 29,876.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,383.89 : 39,154.90 = 21,657.86 : x
  2. Step 2: Convert to fraction form
    28,383.89/39,154.90 = 21,657.86/x
  3. Step 3: Cross multiply
    28,383.89x = 39,154.90 × 21,657.86
  4. Step 4: Simplify right side
    28,383.89x = 848,011,342.51
  5. Step 5: Solve for x
    x = 848,011,342.51/28,383.89
  6. Step 6: Final answer
    x = 29,876.50

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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.