Home / 9,921.64-13,692.20-5,445.40

Finding the Fourth Proportional to 9,921.64, 13,692.20 and 5,445.40

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Solution

The fourth proportional to 9,921.64, 13,692.20 and 5,445.40 is: 7,514.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,921.64 : 13,692.20 = 5,445.40 : x
  2. Step 2: Convert to fraction form
    9,921.64/13,692.20 = 5,445.40/x
  3. Step 3: Cross multiply
    9,921.64x = 13,692.20 × 5,445.40
  4. Step 4: Simplify right side
    9,921.64x = 74,559,505.88
  5. Step 5: Solve for x
    x = 74,559,505.88/9,921.64
  6. Step 6: Final answer
    x = 7,514.84

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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.