Home / 20,518.78-28,297.12-13,449.10

Finding the Fourth Proportional to 20,518.78, 28,297.12 and 13,449.10

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Solution

The fourth proportional to 20,518.78, 28,297.12 and 13,449.10 is: 18,547.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.78 : 28,297.12 = 13,449.10 : x
  2. Step 2: Convert to fraction form
    20,518.78/28,297.12 = 13,449.10/x
  3. Step 3: Cross multiply
    20,518.78x = 28,297.12 × 13,449.10
  4. Step 4: Simplify right side
    20,518.78x = 380,570,796.59
  5. Step 5: Solve for x
    x = 380,570,796.59/20,518.78
  6. Step 6: Final answer
    x = 18,547.44

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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.