Home / 20,867.68-31,300.14-9,776.86

Finding the Fourth Proportional to 20,867.68, 31,300.14 and 9,776.86

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Solution

The fourth proportional to 20,867.68, 31,300.14 and 9,776.86 is: 14,664.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.68 : 31,300.14 = 9,776.86 : x
  2. Step 2: Convert to fraction form
    20,867.68/31,300.14 = 9,776.86/x
  3. Step 3: Cross multiply
    20,867.68x = 31,300.14 × 9,776.86
  4. Step 4: Simplify right side
    20,867.68x = 306,017,086.76
  5. Step 5: Solve for x
    x = 306,017,086.76/20,867.68
  6. Step 6: Final answer
    x = 14,664.64

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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.