Home / 20,914.56-28,875.60-12,965.28

Finding the Fourth Proportional to 20,914.56, 28,875.60 and 12,965.28

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Solution

The fourth proportional to 20,914.56, 28,875.60 and 12,965.28 is: 17,900.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,914.56 : 28,875.60 = 12,965.28 : x
  2. Step 2: Convert to fraction form
    20,914.56/28,875.60 = 12,965.28/x
  3. Step 3: Cross multiply
    20,914.56x = 28,875.60 × 12,965.28
  4. Step 4: Simplify right side
    20,914.56x = 374,380,239.17
  5. Step 5: Solve for x
    x = 374,380,239.17/20,914.56
  6. Step 6: Final answer
    x = 17,900.46

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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.