Home / 20,386.36-28,128.90-13,323.16

Finding the Fourth Proportional to 20,386.36, 28,128.90 and 13,323.16

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Solution

The fourth proportional to 20,386.36, 28,128.90 and 13,323.16 is: 18,383.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.36 : 28,128.90 = 13,323.16 : x
  2. Step 2: Convert to fraction form
    20,386.36/28,128.90 = 13,323.16/x
  3. Step 3: Cross multiply
    20,386.36x = 28,128.90 × 13,323.16
  4. Step 4: Simplify right side
    20,386.36x = 374,765,835.32
  5. Step 5: Solve for x
    x = 374,765,835.32/20,386.36
  6. Step 6: Final answer
    x = 18,383.17

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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.