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Finding the Fourth Proportional to 56,399.81, 84,609.45 and 18,963.45

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Solution

The fourth proportional to 56,399.81, 84,609.45 and 18,963.45 is: 28,448.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,399.81 : 84,609.45 = 18,963.45 : x
  2. Step 2: Convert to fraction form
    56,399.81/84,609.45 = 18,963.45/x
  3. Step 3: Cross multiply
    56,399.81x = 84,609.45 × 18,963.45
  4. Step 4: Simplify right side
    56,399.81x = 1,604,487,074.60
  5. Step 5: Solve for x
    x = 1,604,487,074.60/56,399.81
  6. Step 6: Final answer
    x = 28,448.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.