Home / 13,045.26-18,127.34-12,909.79

Finding the Fourth Proportional to 13,045.26, 18,127.34 and 12,909.79

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Solution

The fourth proportional to 13,045.26, 18,127.34 and 12,909.79 is: 17,939.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,045.26 : 18,127.34 = 12,909.79 : x
  2. Step 2: Convert to fraction form
    13,045.26/18,127.34 = 12,909.79/x
  3. Step 3: Cross multiply
    13,045.26x = 18,127.34 × 12,909.79
  4. Step 4: Simplify right side
    13,045.26x = 234,020,139.61
  5. Step 5: Solve for x
    x = 234,020,139.61/13,045.26
  6. Step 6: Final answer
    x = 17,939.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.