Home / 20,588.91-28,412.70-11,157.47

Finding the Fourth Proportional to 20,588.91, 28,412.70 and 11,157.47

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Solution

The fourth proportional to 20,588.91, 28,412.70 and 11,157.47 is: 15,397.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,588.91 : 28,412.70 = 11,157.47 : x
  2. Step 2: Convert to fraction form
    20,588.91/28,412.70 = 11,157.47/x
  3. Step 3: Cross multiply
    20,588.91x = 28,412.70 × 11,157.47
  4. Step 4: Simplify right side
    20,588.91x = 317,013,847.87
  5. Step 5: Solve for x
    x = 317,013,847.87/20,588.91
  6. Step 6: Final answer
    x = 15,397.31

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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.