Home / 20,867.46-31,308.84-9,777.72

Finding the Fourth Proportional to 20,867.46, 31,308.84 and 9,777.72

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Solution

The fourth proportional to 20,867.46, 31,308.84 and 9,777.72 is: 14,670.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.46 : 31,308.84 = 9,777.72 : x
  2. Step 2: Convert to fraction form
    20,867.46/31,308.84 = 9,777.72/x
  3. Step 3: Cross multiply
    20,867.46x = 31,308.84 × 9,777.72
  4. Step 4: Simplify right side
    20,867.46x = 306,129,071.04
  5. Step 5: Solve for x
    x = 306,129,071.04/20,867.46
  6. Step 6: Final answer
    x = 14,670.16

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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.