Home / 20,569.96-28,390.50-13,122.28

Finding the Fourth Proportional to 20,569.96, 28,390.50 and 13,122.28

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Solution

The fourth proportional to 20,569.96, 28,390.50 and 13,122.28 is: 18,111.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,569.96 : 28,390.50 = 13,122.28 : x
  2. Step 2: Convert to fraction form
    20,569.96/28,390.50 = 13,122.28/x
  3. Step 3: Cross multiply
    20,569.96x = 28,390.50 × 13,122.28
  4. Step 4: Simplify right side
    20,569.96x = 372,548,090.34
  5. Step 5: Solve for x
    x = 372,548,090.34/20,569.96
  6. Step 6: Final answer
    x = 18,111.27

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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.