Home / 20,653.81-28,474.80-16,419.13

Finding the Fourth Proportional to 20,653.81, 28,474.80 and 16,419.13

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Solution

The fourth proportional to 20,653.81, 28,474.80 and 16,419.13 is: 22,636.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.81 : 28,474.80 = 16,419.13 : x
  2. Step 2: Convert to fraction form
    20,653.81/28,474.80 = 16,419.13/x
  3. Step 3: Cross multiply
    20,653.81x = 28,474.80 × 16,419.13
  4. Step 4: Simplify right side
    20,653.81x = 467,531,442.92
  5. Step 5: Solve for x
    x = 467,531,442.92/20,653.81
  6. Step 6: Final answer
    x = 22,636.57

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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.