Home / 13,421.48-18,515.38-10,272.20

Finding the Fourth Proportional to 13,421.48, 18,515.38 and 10,272.20

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Solution

The fourth proportional to 13,421.48, 18,515.38 and 10,272.20 is: 14,170.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.48 : 18,515.38 = 10,272.20 : x
  2. Step 2: Convert to fraction form
    13,421.48/18,515.38 = 10,272.20/x
  3. Step 3: Cross multiply
    13,421.48x = 18,515.38 × 10,272.20
  4. Step 4: Simplify right side
    13,421.48x = 190,193,686.44
  5. Step 5: Solve for x
    x = 190,193,686.44/13,421.48
  6. Step 6: Final answer
    x = 14,170.84

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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.