Home / 13,415.02-18,513.66-7,751.68

Finding the Fourth Proportional to 13,415.02, 18,513.66 and 7,751.68

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Solution

The fourth proportional to 13,415.02, 18,513.66 and 7,751.68 is: 10,697.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415.02 : 18,513.66 = 7,751.68 : x
  2. Step 2: Convert to fraction form
    13,415.02/18,513.66 = 7,751.68/x
  3. Step 3: Cross multiply
    13,415.02x = 18,513.66 × 7,751.68
  4. Step 4: Simplify right side
    13,415.02x = 143,511,967.95
  5. Step 5: Solve for x
    x = 143,511,967.95/13,415.02
  6. Step 6: Final answer
    x = 10,697.86

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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.