Home / 20,354.28-30,528.27-7,880.10

Finding the Fourth Proportional to 20,354.28, 30,528.27 and 7,880.10

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Solution

The fourth proportional to 20,354.28, 30,528.27 and 7,880.10 is: 11,818.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,354.28 : 30,528.27 = 7,880.10 : x
  2. Step 2: Convert to fraction form
    20,354.28/30,528.27 = 7,880.10/x
  3. Step 3: Cross multiply
    20,354.28x = 30,528.27 × 7,880.10
  4. Step 4: Simplify right side
    20,354.28x = 240,565,820.43
  5. Step 5: Solve for x
    x = 240,565,820.43/20,354.28
  6. Step 6: Final answer
    x = 11,818.93

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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.