Home / 20,878.66-28,804.53-13,325.26

Finding the Fourth Proportional to 20,878.66, 28,804.53 and 13,325.26

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Solution

The fourth proportional to 20,878.66, 28,804.53 and 13,325.26 is: 18,383.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,878.66 : 28,804.53 = 13,325.26 : x
  2. Step 2: Convert to fraction form
    20,878.66/28,804.53 = 13,325.26/x
  3. Step 3: Cross multiply
    20,878.66x = 28,804.53 × 13,325.26
  4. Step 4: Simplify right side
    20,878.66x = 383,827,851.43
  5. Step 5: Solve for x
    x = 383,827,851.43/20,878.66
  6. Step 6: Final answer
    x = 18,383.74

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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.