Home / 13,269.70-18,312.15-7,964.50

Finding the Fourth Proportional to 13,269.70, 18,312.15 and 7,964.50

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Solution

The fourth proportional to 13,269.70, 18,312.15 and 7,964.50 is: 10,990.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,269.70 : 18,312.15 = 7,964.50 : x
  2. Step 2: Convert to fraction form
    13,269.70/18,312.15 = 7,964.50/x
  3. Step 3: Cross multiply
    13,269.70x = 18,312.15 × 7,964.50
  4. Step 4: Simplify right side
    13,269.70x = 145,847,118.68
  5. Step 5: Solve for x
    x = 145,847,118.68/13,269.70
  6. Step 6: Final answer
    x = 10,990.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.