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Finding the Fourth Proportional to 20,555.68, 30,653.03 and 20,368.57

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Solution

The fourth proportional to 20,555.68, 30,653.03 and 20,368.57 is: 30,374.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,555.68 : 30,653.03 = 20,368.57 : x
  2. Step 2: Convert to fraction form
    20,555.68/30,653.03 = 20,368.57/x
  3. Step 3: Cross multiply
    20,555.68x = 30,653.03 × 20,368.57
  4. Step 4: Simplify right side
    20,555.68x = 624,358,387.27
  5. Step 5: Solve for x
    x = 624,358,387.27/20,555.68
  6. Step 6: Final answer
    x = 30,374.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.