Home / 20,639.30-28,482.23-11,207.86

Finding the Fourth Proportional to 20,639.30, 28,482.23 and 11,207.86

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Solution

The fourth proportional to 20,639.30, 28,482.23 and 11,207.86 is: 15,466.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.30 : 28,482.23 = 11,207.86 : x
  2. Step 2: Convert to fraction form
    20,639.30/28,482.23 = 11,207.86/x
  3. Step 3: Cross multiply
    20,639.30x = 28,482.23 × 11,207.86
  4. Step 4: Simplify right side
    20,639.30x = 319,224,803.14
  5. Step 5: Solve for x
    x = 319,224,803.14/20,639.30
  6. Step 6: Final answer
    x = 15,466.85

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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.