Home / 20,412.32-28,168.75-11,459.60

Finding the Fourth Proportional to 20,412.32, 28,168.75 and 11,459.60

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Solution

The fourth proportional to 20,412.32, 28,168.75 and 11,459.60 is: 15,814.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.32 : 28,168.75 = 11,459.60 : x
  2. Step 2: Convert to fraction form
    20,412.32/28,168.75 = 11,459.60/x
  3. Step 3: Cross multiply
    20,412.32x = 28,168.75 × 11,459.60
  4. Step 4: Simplify right side
    20,412.32x = 322,802,409.36
  5. Step 5: Solve for x
    x = 322,802,409.36/20,412.32
  6. Step 6: Final answer
    x = 15,814.10

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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.