Home / 13,529.91-20,311.53-6,420.93

Finding the Fourth Proportional to 13,529.91, 20,311.53 and 6,420.93

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Solution

The fourth proportional to 13,529.91, 20,311.53 and 6,420.93 is: 9,639.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,529.91 : 20,311.53 = 6,420.93 : x
  2. Step 2: Convert to fraction form
    13,529.91/20,311.53 = 6,420.93/x
  3. Step 3: Cross multiply
    13,529.91x = 20,311.53 × 6,420.93
  4. Step 4: Simplify right side
    13,529.91x = 130,418,912.32
  5. Step 5: Solve for x
    x = 130,418,912.32/13,529.91
  6. Step 6: Final answer
    x = 9,639.30

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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.