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Finding the Fourth Proportional to 15,019.40, 20,726.10 and 8,731.40

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Solution

The fourth proportional to 15,019.40, 20,726.10 and 8,731.40 is: 12,048.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,019.40 : 20,726.10 = 8,731.40 : x
  2. Step 2: Convert to fraction form
    15,019.40/20,726.10 = 8,731.40/x
  3. Step 3: Cross multiply
    15,019.40x = 20,726.10 × 8,731.40
  4. Step 4: Simplify right side
    15,019.40x = 180,967,869.54
  5. Step 5: Solve for x
    x = 180,967,869.54/15,019.40
  6. Step 6: Final answer
    x = 12,048.94

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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.