Home / 20,412.09-28,170.27-11,459.01

Finding the Fourth Proportional to 20,412.09, 28,170.27 and 11,459.01

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Solution

The fourth proportional to 20,412.09, 28,170.27 and 11,459.01 is: 15,814.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.09 : 28,170.27 = 11,459.01 : x
  2. Step 2: Convert to fraction form
    20,412.09/28,170.27 = 11,459.01/x
  3. Step 3: Cross multiply
    20,412.09x = 28,170.27 × 11,459.01
  4. Step 4: Simplify right side
    20,412.09x = 322,803,405.63
  5. Step 5: Solve for x
    x = 322,803,405.63/20,412.09
  6. Step 6: Final answer
    x = 15,814.32

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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.