Home / 20,411.06-28,168.89-11,459.15

Finding the Fourth Proportional to 20,411.06, 28,168.89 and 11,459.15

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Solution

The fourth proportional to 20,411.06, 28,168.89 and 11,459.15 is: 15,814.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411.06 : 28,168.89 = 11,459.15 : x
  2. Step 2: Convert to fraction form
    20,411.06/28,168.89 = 11,459.15/x
  3. Step 3: Cross multiply
    20,411.06x = 28,168.89 × 11,459.15
  4. Step 4: Simplify right side
    20,411.06x = 322,791,535.84
  5. Step 5: Solve for x
    x = 322,791,535.84/20,411.06
  6. Step 6: Final answer
    x = 15,814.54

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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.