Home / 20,375.36-28,113.72-13,312.16

Finding the Fourth Proportional to 20,375.36, 28,113.72 and 13,312.16

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Solution

The fourth proportional to 20,375.36, 28,113.72 and 13,312.16 is: 18,367.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,375.36 : 28,113.72 = 13,312.16 : x
  2. Step 2: Convert to fraction form
    20,375.36/28,113.72 = 13,312.16/x
  3. Step 3: Cross multiply
    20,375.36x = 28,113.72 × 13,312.16
  4. Step 4: Simplify right side
    20,375.36x = 374,254,338.84
  5. Step 5: Solve for x
    x = 374,254,338.84/20,375.36
  6. Step 6: Final answer
    x = 18,367.99

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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.