Home / 12,939.40-19,423.70-8,565.40

Finding the Fourth Proportional to 12,939.40, 19,423.70 and 8,565.40

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Solution

The fourth proportional to 12,939.40, 19,423.70 and 8,565.40 is: 12,857.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.40 : 19,423.70 = 8,565.40 : x
  2. Step 2: Convert to fraction form
    12,939.40/19,423.70 = 8,565.40/x
  3. Step 3: Cross multiply
    12,939.40x = 19,423.70 × 8,565.40
  4. Step 4: Simplify right side
    12,939.40x = 166,371,759.98
  5. Step 5: Solve for x
    x = 166,371,759.98/12,939.40
  6. Step 6: Final answer
    x = 12,857.76

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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.