Home / 12,538.12-18,802.84-5,140.48

Finding the Fourth Proportional to 12,538.12, 18,802.84 and 5,140.48

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Solution

The fourth proportional to 12,538.12, 18,802.84 and 5,140.48 is: 7,708.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,538.12 : 18,802.84 = 5,140.48 : x
  2. Step 2: Convert to fraction form
    12,538.12/18,802.84 = 5,140.48/x
  3. Step 3: Cross multiply
    12,538.12x = 18,802.84 × 5,140.48
  4. Step 4: Simplify right side
    12,538.12x = 96,655,622.96
  5. Step 5: Solve for x
    x = 96,655,622.96/12,538.12
  6. Step 6: Final answer
    x = 7,708.94

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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.