Home / 20,730.80-31,096.20-14,164.40

Finding the Fourth Proportional to 20,730.80, 31,096.20 and 14,164.40

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Solution

The fourth proportional to 20,730.80, 31,096.20 and 14,164.40 is: 21,246.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.80 : 31,096.20 = 14,164.40 : x
  2. Step 2: Convert to fraction form
    20,730.80/31,096.20 = 14,164.40/x
  3. Step 3: Cross multiply
    20,730.80x = 31,096.20 × 14,164.40
  4. Step 4: Simplify right side
    20,730.80x = 440,459,015.28
  5. Step 5: Solve for x
    x = 440,459,015.28/20,730.80
  6. Step 6: Final answer
    x = 21,246.60

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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.