Home / 19,013.40-28,520.10-12,403.80

Finding the Fourth Proportional to 19,013.40, 28,520.10 and 12,403.80

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Solution

The fourth proportional to 19,013.40, 28,520.10 and 12,403.80 is: 18,605.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,013.40 : 28,520.10 = 12,403.80 : x
  2. Step 2: Convert to fraction form
    19,013.40/28,520.10 = 12,403.80/x
  3. Step 3: Cross multiply
    19,013.40x = 28,520.10 × 12,403.80
  4. Step 4: Simplify right side
    19,013.40x = 353,757,616.38
  5. Step 5: Solve for x
    x = 353,757,616.38/19,013.40
  6. Step 6: Final answer
    x = 18,605.70

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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.