Home / 20,865.04-28,796.52-13,434.64

Finding the Fourth Proportional to 20,865.04, 28,796.52 and 13,434.64

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Solution

The fourth proportional to 20,865.04, 28,796.52 and 13,434.64 is: 18,541.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.04 : 28,796.52 = 13,434.64 : x
  2. Step 2: Convert to fraction form
    20,865.04/28,796.52 = 13,434.64/x
  3. Step 3: Cross multiply
    20,865.04x = 28,796.52 × 13,434.64
  4. Step 4: Simplify right side
    20,865.04x = 386,870,879.45
  5. Step 5: Solve for x
    x = 386,870,879.45/20,865.04
  6. Step 6: Final answer
    x = 18,541.58

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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.