Home / 20,415.24-28,175.58-12,457.80

Finding the Fourth Proportional to 20,415.24, 28,175.58 and 12,457.80

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Solution

The fourth proportional to 20,415.24, 28,175.58 and 12,457.80 is: 17,193.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.24 : 28,175.58 = 12,457.80 : x
  2. Step 2: Convert to fraction form
    20,415.24/28,175.58 = 12,457.80/x
  3. Step 3: Cross multiply
    20,415.24x = 28,175.58 × 12,457.80
  4. Step 4: Simplify right side
    20,415.24x = 351,005,740.52
  5. Step 5: Solve for x
    x = 351,005,740.52/20,415.24
  6. Step 6: Final answer
    x = 17,193.32

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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.