Home / 13,272.12-18,271.02-11,615.16

Finding the Fourth Proportional to 13,272.12, 18,271.02 and 11,615.16

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Solution

The fourth proportional to 13,272.12, 18,271.02 and 11,615.16 is: 15,989.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,272.12 : 18,271.02 = 11,615.16 : x
  2. Step 2: Convert to fraction form
    13,272.12/18,271.02 = 11,615.16/x
  3. Step 3: Cross multiply
    13,272.12x = 18,271.02 × 11,615.16
  4. Step 4: Simplify right side
    13,272.12x = 212,220,820.66
  5. Step 5: Solve for x
    x = 212,220,820.66/13,272.12
  6. Step 6: Final answer
    x = 15,989.97

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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.