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Finding the Fourth Proportional to 30,888.56, 46,339.26 and 12,420.56

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Solution

The fourth proportional to 30,888.56, 46,339.26 and 12,420.56 is: 18,633.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,888.56 : 46,339.26 = 12,420.56 : x
  2. Step 2: Convert to fraction form
    30,888.56/46,339.26 = 12,420.56/x
  3. Step 3: Cross multiply
    30,888.56x = 46,339.26 × 12,420.56
  4. Step 4: Simplify right side
    30,888.56x = 575,559,559.19
  5. Step 5: Solve for x
    x = 575,559,559.19/30,888.56
  6. Step 6: Final answer
    x = 18,633.42

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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.