Home / 28,750.74-39,662.91-20,780.34

Finding the Fourth Proportional to 28,750.74, 39,662.91 and 20,780.34

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Solution

The fourth proportional to 28,750.74, 39,662.91 and 20,780.34 is: 28,667.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,750.74 : 39,662.91 = 20,780.34 : x
  2. Step 2: Convert to fraction form
    28,750.74/39,662.91 = 20,780.34/x
  3. Step 3: Cross multiply
    28,750.74x = 39,662.91 × 20,780.34
  4. Step 4: Simplify right side
    28,750.74x = 824,208,755.19
  5. Step 5: Solve for x
    x = 824,208,755.19/28,750.74
  6. Step 6: Final answer
    x = 28,667.39

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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.