Home / 20,639.24-28,482.34-11,207.88

Finding the Fourth Proportional to 20,639.24, 28,482.34 and 11,207.88

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Solution

The fourth proportional to 20,639.24, 28,482.34 and 11,207.88 is: 15,466.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.24 : 28,482.34 = 11,207.88 : x
  2. Step 2: Convert to fraction form
    20,639.24/28,482.34 = 11,207.88/x
  3. Step 3: Cross multiply
    20,639.24x = 28,482.34 × 11,207.88
  4. Step 4: Simplify right side
    20,639.24x = 319,226,648.84
  5. Step 5: Solve for x
    x = 319,226,648.84/20,639.24
  6. Step 6: Final answer
    x = 15,466.98

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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.