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Finding the Fourth Proportional to 56,384.96, 84,578.81 and 18,945.57

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Solution

The fourth proportional to 56,384.96, 84,578.81 and 18,945.57 is: 28,418.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,384.96 : 84,578.81 = 18,945.57 : x
  2. Step 2: Convert to fraction form
    56,384.96/84,578.81 = 18,945.57/x
  3. Step 3: Cross multiply
    56,384.96x = 84,578.81 × 18,945.57
  4. Step 4: Simplify right side
    56,384.96x = 1,602,393,803.22
  5. Step 5: Solve for x
    x = 1,602,393,803.22/56,384.96
  6. Step 6: Final answer
    x = 28,418.82

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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.