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Finding the Fourth Proportional to 39,927.40, 59,840.70 and 20,211.40

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Solution

The fourth proportional to 39,927.40, 59,840.70 and 20,211.40 is: 30,291.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,927.40 : 59,840.70 = 20,211.40 : x
  2. Step 2: Convert to fraction form
    39,927.40/59,840.70 = 20,211.40/x
  3. Step 3: Cross multiply
    39,927.40x = 59,840.70 × 20,211.40
  4. Step 4: Simplify right side
    39,927.40x = 1,209,464,323.98
  5. Step 5: Solve for x
    x = 1,209,464,323.98/39,927.40
  6. Step 6: Final answer
    x = 30,291.59

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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.