Home / 20,435.40-28,200.24-12,475.80

Finding the Fourth Proportional to 20,435.40, 28,200.24 and 12,475.80

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Solution

The fourth proportional to 20,435.40, 28,200.24 and 12,475.80 is: 17,216.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,435.40 : 28,200.24 = 12,475.80 : x
  2. Step 2: Convert to fraction form
    20,435.40/28,200.24 = 12,475.80/x
  3. Step 3: Cross multiply
    20,435.40x = 28,200.24 × 12,475.80
  4. Step 4: Simplify right side
    20,435.40x = 351,820,554.19
  5. Step 5: Solve for x
    x = 351,820,554.19/20,435.40
  6. Step 6: Final answer
    x = 17,216.23

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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.