Home / 13,721.45-20,581.37-8,457.47

Finding the Fourth Proportional to 13,721.45, 20,581.37 and 8,457.47

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Solution

The fourth proportional to 13,721.45, 20,581.37 and 8,457.47 is: 12,685.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.45 : 20,581.37 = 8,457.47 : x
  2. Step 2: Convert to fraction form
    13,721.45/20,581.37 = 8,457.47/x
  3. Step 3: Cross multiply
    13,721.45x = 20,581.37 × 8,457.47
  4. Step 4: Simplify right side
    13,721.45x = 174,066,174.14
  5. Step 5: Solve for x
    x = 174,066,174.14/13,721.45
  6. Step 6: Final answer
    x = 12,685.70

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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.