Home / 13,635.51-18,815.40-7,666.85

Finding the Fourth Proportional to 13,635.51, 18,815.40 and 7,666.85

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Solution

The fourth proportional to 13,635.51, 18,815.40 and 7,666.85 is: 10,579.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,635.51 : 18,815.40 = 7,666.85 : x
  2. Step 2: Convert to fraction form
    13,635.51/18,815.40 = 7,666.85/x
  3. Step 3: Cross multiply
    13,635.51x = 18,815.40 × 7,666.85
  4. Step 4: Simplify right side
    13,635.51x = 144,254,755.41
  5. Step 5: Solve for x
    x = 144,254,755.41/13,635.51
  6. Step 6: Final answer
    x = 10,579.34

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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.