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Finding the Fourth Proportional to 17,687.60, 24,421.19 and 12,389.59

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Solution

The fourth proportional to 17,687.60, 24,421.19 and 12,389.59 is: 17,106.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,687.60 : 24,421.19 = 12,389.59 : x
  2. Step 2: Convert to fraction form
    17,687.60/24,421.19 = 12,389.59/x
  3. Step 3: Cross multiply
    17,687.60x = 24,421.19 × 12,389.59
  4. Step 4: Simplify right side
    17,687.60x = 302,568,531.41
  5. Step 5: Solve for x
    x = 302,568,531.41/17,687.60
  6. Step 6: Final answer
    x = 17,106.25

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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.