Home / 20,962.88-31,455.12-9,284.30

Finding the Fourth Proportional to 20,962.88, 31,455.12 and 9,284.30

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Solution

The fourth proportional to 20,962.88, 31,455.12 and 9,284.30 is: 13,931.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,962.88 : 31,455.12 = 9,284.30 : x
  2. Step 2: Convert to fraction form
    20,962.88/31,455.12 = 9,284.30/x
  3. Step 3: Cross multiply
    20,962.88x = 31,455.12 × 9,284.30
  4. Step 4: Simplify right side
    20,962.88x = 292,038,770.62
  5. Step 5: Solve for x
    x = 292,038,770.62/20,962.88
  6. Step 6: Final answer
    x = 13,931.23

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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.