Home / 13,645.05-20,434.70-7,783.89

Finding the Fourth Proportional to 13,645.05, 20,434.70 and 7,783.89

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Solution

The fourth proportional to 13,645.05, 20,434.70 and 7,783.89 is: 11,657.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,645.05 : 20,434.70 = 7,783.89 : x
  2. Step 2: Convert to fraction form
    13,645.05/20,434.70 = 7,783.89/x
  3. Step 3: Cross multiply
    13,645.05x = 20,434.70 × 7,783.89
  4. Step 4: Simplify right side
    13,645.05x = 159,061,418.06
  5. Step 5: Solve for x
    x = 159,061,418.06/13,645.05
  6. Step 6: Final answer
    x = 11,657.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.