Home / 20,363.09-28,101.07-12,405.31

Finding the Fourth Proportional to 20,363.09, 28,101.07 and 12,405.31

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Solution

The fourth proportional to 20,363.09, 28,101.07 and 12,405.31 is: 17,119.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,363.09 : 28,101.07 = 12,405.31 : x
  2. Step 2: Convert to fraction form
    20,363.09/28,101.07 = 12,405.31/x
  3. Step 3: Cross multiply
    20,363.09x = 28,101.07 × 12,405.31
  4. Step 4: Simplify right side
    20,363.09x = 348,602,564.74
  5. Step 5: Solve for x
    x = 348,602,564.74/20,363.09
  6. Step 6: Final answer
    x = 17,119.33

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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.