Home / 20,860.30-31,285.58-9,774.64

Finding the Fourth Proportional to 20,860.30, 31,285.58 and 9,774.64

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Solution

The fourth proportional to 20,860.30, 31,285.58 and 9,774.64 is: 14,659.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.30 : 31,285.58 = 9,774.64 : x
  2. Step 2: Convert to fraction form
    20,860.30/31,285.58 = 9,774.64/x
  3. Step 3: Cross multiply
    20,860.30x = 31,285.58 × 9,774.64
  4. Step 4: Simplify right side
    20,860.30x = 305,805,281.69
  5. Step 5: Solve for x
    x = 305,805,281.69/20,860.30
  6. Step 6: Final answer
    x = 14,659.68

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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.