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Finding the Fourth Proportional to 56,427.60, 84,642.62 and 20,890.68

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Solution

The fourth proportional to 56,427.60, 84,642.62 and 20,890.68 is: 31,336.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,427.60 : 84,642.62 = 20,890.68 : x
  2. Step 2: Convert to fraction form
    56,427.60/84,642.62 = 20,890.68/x
  3. Step 3: Cross multiply
    56,427.60x = 84,642.62 × 20,890.68
  4. Step 4: Simplify right side
    56,427.60x = 1,768,241,888.78
  5. Step 5: Solve for x
    x = 1,768,241,888.78/56,427.60
  6. Step 6: Final answer
    x = 31,336.47

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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.