Home / 13,666.78-18,859.80-7,698.34

Finding the Fourth Proportional to 13,666.78, 18,859.80 and 7,698.34

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Solution

The fourth proportional to 13,666.78, 18,859.80 and 7,698.34 is: 10,623.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,666.78 : 18,859.80 = 7,698.34 : x
  2. Step 2: Convert to fraction form
    13,666.78/18,859.80 = 7,698.34/x
  3. Step 3: Cross multiply
    13,666.78x = 18,859.80 × 7,698.34
  4. Step 4: Simplify right side
    13,666.78x = 145,189,152.73
  5. Step 5: Solve for x
    x = 145,189,152.73/13,666.78
  6. Step 6: Final answer
    x = 10,623.51

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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.