Home / 20,984.64-31,483.56-9,890.88

Finding the Fourth Proportional to 20,984.64, 31,483.56 and 9,890.88

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Solution

The fourth proportional to 20,984.64, 31,483.56 and 9,890.88 is: 14,839.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,984.64 : 31,483.56 = 9,890.88 : x
  2. Step 2: Convert to fraction form
    20,984.64/31,483.56 = 9,890.88/x
  3. Step 3: Cross multiply
    20,984.64x = 31,483.56 × 9,890.88
  4. Step 4: Simplify right side
    20,984.64x = 311,400,113.93
  5. Step 5: Solve for x
    x = 311,400,113.93/20,984.64
  6. Step 6: Final answer
    x = 14,839.43

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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.