Home / 13,620.08-20,415.56-8,938.32

Finding the Fourth Proportional to 13,620.08, 20,415.56 and 8,938.32

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Solution

The fourth proportional to 13,620.08, 20,415.56 and 8,938.32 is: 13,397.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.08 : 20,415.56 = 8,938.32 : x
  2. Step 2: Convert to fraction form
    13,620.08/20,415.56 = 8,938.32/x
  3. Step 3: Cross multiply
    13,620.08x = 20,415.56 × 8,938.32
  4. Step 4: Simplify right side
    13,620.08x = 182,480,808.26
  5. Step 5: Solve for x
    x = 182,480,808.26/13,620.08
  6. Step 6: Final answer
    x = 13,397.92

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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.