Home / 20,434.88-28,202.74-12,475.40

Finding the Fourth Proportional to 20,434.88, 28,202.74 and 12,475.40

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Solution

The fourth proportional to 20,434.88, 28,202.74 and 12,475.40 is: 17,217.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,434.88 : 28,202.74 = 12,475.40 : x
  2. Step 2: Convert to fraction form
    20,434.88/28,202.74 = 12,475.40/x
  3. Step 3: Cross multiply
    20,434.88x = 28,202.74 × 12,475.40
  4. Step 4: Simplify right side
    20,434.88x = 351,840,462.60
  5. Step 5: Solve for x
    x = 351,840,462.60/20,434.88
  6. Step 6: Final answer
    x = 17,217.64

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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.