Home / 13,623.24-20,439.72-7,784.76

Finding the Fourth Proportional to 13,623.24, 20,439.72 and 7,784.76

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Solution

The fourth proportional to 13,623.24, 20,439.72 and 7,784.76 is: 11,679.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,623.24 : 20,439.72 = 7,784.76 : x
  2. Step 2: Convert to fraction form
    13,623.24/20,439.72 = 7,784.76/x
  3. Step 3: Cross multiply
    13,623.24x = 20,439.72 × 7,784.76
  4. Step 4: Simplify right side
    13,623.24x = 159,118,314.67
  5. Step 5: Solve for x
    x = 159,118,314.67/13,623.24
  6. Step 6: Final answer
    x = 11,679.92

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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.