Home / 20,520.34-28,318.01-11,088.90

Finding the Fourth Proportional to 20,520.34, 28,318.01 and 11,088.90

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Solution

The fourth proportional to 20,520.34, 28,318.01 and 11,088.90 is: 15,302.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.34 : 28,318.01 = 11,088.90 : x
  2. Step 2: Convert to fraction form
    20,520.34/28,318.01 = 11,088.90/x
  3. Step 3: Cross multiply
    20,520.34x = 28,318.01 × 11,088.90
  4. Step 4: Simplify right side
    20,520.34x = 314,015,525.64
  5. Step 5: Solve for x
    x = 314,015,525.64/20,520.34
  6. Step 6: Final answer
    x = 15,302.65

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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.