Home / 12,720.18-17,554.49-7,684.31

Finding the Fourth Proportional to 12,720.18, 17,554.49 and 7,684.31

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Solution

The fourth proportional to 12,720.18, 17,554.49 and 7,684.31 is: 10,604.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.18 : 17,554.49 = 7,684.31 : x
  2. Step 2: Convert to fraction form
    12,720.18/17,554.49 = 7,684.31/x
  3. Step 3: Cross multiply
    12,720.18x = 17,554.49 × 7,684.31
  4. Step 4: Simplify right side
    12,720.18x = 134,894,206.15
  5. Step 5: Solve for x
    x = 134,894,206.15/12,720.18
  6. Step 6: Final answer
    x = 10,604.74

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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.