Home / 13,645.34-20,423.60-7,631.49

Finding the Fourth Proportional to 13,645.34, 20,423.60 and 7,631.49

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Solution

The fourth proportional to 13,645.34, 20,423.60 and 7,631.49 is: 11,422.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,645.34 : 20,423.60 = 7,631.49 : x
  2. Step 2: Convert to fraction form
    13,645.34/20,423.60 = 7,631.49/x
  3. Step 3: Cross multiply
    13,645.34x = 20,423.60 × 7,631.49
  4. Step 4: Simplify right side
    13,645.34x = 155,862,461.01
  5. Step 5: Solve for x
    x = 155,862,461.01/13,645.34
  6. Step 6: Final answer
    x = 11,422.40

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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.