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Finding the Fourth Proportional to 14,930.61, 20,603.72 and 8,215.61

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Solution

The fourth proportional to 14,930.61, 20,603.72 and 8,215.61 is: 11,337.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,930.61 : 20,603.72 = 8,215.61 : x
  2. Step 2: Convert to fraction form
    14,930.61/20,603.72 = 8,215.61/x
  3. Step 3: Cross multiply
    14,930.61x = 20,603.72 × 8,215.61
  4. Step 4: Simplify right side
    14,930.61x = 169,271,983.97
  5. Step 5: Solve for x
    x = 169,271,983.97/14,930.61
  6. Step 6: Final answer
    x = 11,337.25

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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.