Home / 20,587.55-28,410.80-11,156.12

Finding the Fourth Proportional to 20,587.55, 28,410.80 and 11,156.12

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Solution

The fourth proportional to 20,587.55, 28,410.80 and 11,156.12 is: 15,395.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.55 : 28,410.80 = 11,156.12 : x
  2. Step 2: Convert to fraction form
    20,587.55/28,410.80 = 11,156.12/x
  3. Step 3: Cross multiply
    20,587.55x = 28,410.80 × 11,156.12
  4. Step 4: Simplify right side
    20,587.55x = 316,954,096.26
  5. Step 5: Solve for x
    x = 316,954,096.26/20,587.55
  6. Step 6: Final answer
    x = 15,395.43

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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.