Home / 13,636.28-20,421.60-9,240.40

Finding the Fourth Proportional to 13,636.28, 20,421.60 and 9,240.40

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Solution

The fourth proportional to 13,636.28, 20,421.60 and 9,240.40 is: 13,838.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,636.28 : 20,421.60 = 9,240.40 : x
  2. Step 2: Convert to fraction form
    13,636.28/20,421.60 = 9,240.40/x
  3. Step 3: Cross multiply
    13,636.28x = 20,421.60 × 9,240.40
  4. Step 4: Simplify right side
    13,636.28x = 188,703,752.64
  5. Step 5: Solve for x
    x = 188,703,752.64/13,636.28
  6. Step 6: Final answer
    x = 13,838.36

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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.