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Finding the Fourth Proportional to 17,878.65, 24,672.59 and 9,920.89

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Solution

The fourth proportional to 17,878.65, 24,672.59 and 9,920.89 is: 13,690.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,878.65 : 24,672.59 = 9,920.89 : x
  2. Step 2: Convert to fraction form
    17,878.65/24,672.59 = 9,920.89/x
  3. Step 3: Cross multiply
    17,878.65x = 24,672.59 × 9,920.89
  4. Step 4: Simplify right side
    17,878.65x = 244,774,051.41
  5. Step 5: Solve for x
    x = 244,774,051.41/17,878.65
  6. Step 6: Final answer
    x = 13,690.86

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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.