Home / 13,280.20-18,221.21-13,156.36

Finding the Fourth Proportional to 13,280.20, 18,221.21 and 13,156.36

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Solution

The fourth proportional to 13,280.20, 18,221.21 and 13,156.36 is: 18,051.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,280.20 : 18,221.21 = 13,156.36 : x
  2. Step 2: Convert to fraction form
    13,280.20/18,221.21 = 13,156.36/x
  3. Step 3: Cross multiply
    13,280.20x = 18,221.21 × 13,156.36
  4. Step 4: Simplify right side
    13,280.20x = 239,724,798.40
  5. Step 5: Solve for x
    x = 239,724,798.40/13,280.20
  6. Step 6: Final answer
    x = 18,051.29

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.