Home / 20,392.99-28,140.48-12,433.64

Finding the Fourth Proportional to 20,392.99, 28,140.48 and 12,433.64

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Solution

The fourth proportional to 20,392.99, 28,140.48 and 12,433.64 is: 17,157.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.99 : 28,140.48 = 12,433.64 : x
  2. Step 2: Convert to fraction form
    20,392.99/28,140.48 = 12,433.64/x
  3. Step 3: Cross multiply
    20,392.99x = 28,140.48 × 12,433.64
  4. Step 4: Simplify right side
    20,392.99x = 349,888,457.04
  5. Step 5: Solve for x
    x = 349,888,457.04/20,392.99
  6. Step 6: Final answer
    x = 17,157.29

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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.