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Finding the Fourth Proportional to 56,438.74, 84,666.87 and 18,995.90

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Solution

The fourth proportional to 56,438.74, 84,666.87 and 18,995.90 is: 28,496.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,438.74 : 84,666.87 = 18,995.90 : x
  2. Step 2: Convert to fraction form
    56,438.74/84,666.87 = 18,995.90/x
  3. Step 3: Cross multiply
    56,438.74x = 84,666.87 × 18,995.90
  4. Step 4: Simplify right side
    56,438.74x = 1,608,322,972.50
  5. Step 5: Solve for x
    x = 1,608,322,972.50/56,438.74
  6. Step 6: Final answer
    x = 28,496.79

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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.