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Finding the Fourth Proportional to 13,935.40, 20,903.10 and 4,575.40

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Solution

The fourth proportional to 13,935.40, 20,903.10 and 4,575.40 is: 6,863.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,935.40 : 20,903.10 = 4,575.40 : x
  2. Step 2: Convert to fraction form
    13,935.40/20,903.10 = 4,575.40/x
  3. Step 3: Cross multiply
    13,935.40x = 20,903.10 × 4,575.40
  4. Step 4: Simplify right side
    13,935.40x = 95,640,043.74
  5. Step 5: Solve for x
    x = 95,640,043.74/13,935.40
  6. Step 6: Final answer
    x = 6,863.10

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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.