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Finding the Fourth Proportional to 29,931.40, 44,906.70 and 20,081.80

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Solution

The fourth proportional to 29,931.40, 44,906.70 and 20,081.80 is: 30,129.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,931.40 : 44,906.70 = 20,081.80 : x
  2. Step 2: Convert to fraction form
    29,931.40/44,906.70 = 20,081.80/x
  3. Step 3: Cross multiply
    29,931.40x = 44,906.70 × 20,081.80
  4. Step 4: Simplify right side
    29,931.40x = 901,807,368.06
  5. Step 5: Solve for x
    x = 901,807,368.06/29,931.40
  6. Step 6: Final answer
    x = 30,129.14

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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.