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Finding the Fourth Proportional to 55,995.20, 84,025.20 and 20,938.40

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Solution

The fourth proportional to 55,995.20, 84,025.20 and 20,938.40 is: 31,419.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,995.20 : 84,025.20 = 20,938.40 : x
  2. Step 2: Convert to fraction form
    55,995.20/84,025.20 = 20,938.40/x
  3. Step 3: Cross multiply
    55,995.20x = 84,025.20 × 20,938.40
  4. Step 4: Simplify right side
    55,995.20x = 1,759,353,247.68
  5. Step 5: Solve for x
    x = 1,759,353,247.68/55,995.20
  6. Step 6: Final answer
    x = 31,419.72

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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.