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Finding the Fourth Proportional to 13,633.40, 20,439.30 and 7,477.40

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Solution

The fourth proportional to 13,633.40, 20,439.30 and 7,477.40 is: 11,210.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,633.40 : 20,439.30 = 7,477.40 : x
  2. Step 2: Convert to fraction form
    13,633.40/20,439.30 = 7,477.40/x
  3. Step 3: Cross multiply
    13,633.40x = 20,439.30 × 7,477.40
  4. Step 4: Simplify right side
    13,633.40x = 152,832,821.82
  5. Step 5: Solve for x
    x = 152,832,821.82/13,633.40
  6. Step 6: Final answer
    x = 11,210.18

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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.