Home / 11,477.65-15,845.20-7,720.58

Finding the Fourth Proportional to 11,477.65, 15,845.20 and 7,720.58

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Solution

The fourth proportional to 11,477.65, 15,845.20 and 7,720.58 is: 10,658.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,477.65 : 15,845.20 = 7,720.58 : x
  2. Step 2: Convert to fraction form
    11,477.65/15,845.20 = 7,720.58/x
  3. Step 3: Cross multiply
    11,477.65x = 15,845.20 × 7,720.58
  4. Step 4: Simplify right side
    11,477.65x = 122,334,127.68
  5. Step 5: Solve for x
    x = 122,334,127.68/11,477.65
  6. Step 6: Final answer
    x = 10,658.47

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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.