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Finding the Fourth Proportional to 16,661.70, 24,931.80 and 12,287.70

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Solution

The fourth proportional to 16,661.70, 24,931.80 and 12,287.70 is: 18,386.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,661.70 : 24,931.80 = 12,287.70 : x
  2. Step 2: Convert to fraction form
    16,661.70/24,931.80 = 12,287.70/x
  3. Step 3: Cross multiply
    16,661.70x = 24,931.80 × 12,287.70
  4. Step 4: Simplify right side
    16,661.70x = 306,354,478.86
  5. Step 5: Solve for x
    x = 306,354,478.86/16,661.70
  6. Step 6: Final answer
    x = 18,386.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.