Home / 20,415.16-28,173.99-12,456.91

Finding the Fourth Proportional to 20,415.16, 28,173.99 and 12,456.91

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Solution

The fourth proportional to 20,415.16, 28,173.99 and 12,456.91 is: 17,191.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.16 : 28,173.99 = 12,456.91 : x
  2. Step 2: Convert to fraction form
    20,415.16/28,173.99 = 12,456.91/x
  3. Step 3: Cross multiply
    20,415.16x = 28,173.99 × 12,456.91
  4. Step 4: Simplify right side
    20,415.16x = 350,960,857.77
  5. Step 5: Solve for x
    x = 350,960,857.77/20,415.16
  6. Step 6: Final answer
    x = 17,191.19

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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.