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Finding the Fourth Proportional to 18,965.61, 28,434.38 and 9,095.49

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Solution

The fourth proportional to 18,965.61, 28,434.38 and 9,095.49 is: 13,636.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965.61 : 28,434.38 = 9,095.49 : x
  2. Step 2: Convert to fraction form
    18,965.61/28,434.38 = 9,095.49/x
  3. Step 3: Cross multiply
    18,965.61x = 28,434.38 × 9,095.49
  4. Step 4: Simplify right side
    18,965.61x = 258,624,573.47
  5. Step 5: Solve for x
    x = 258,624,573.47/18,965.61
  6. Step 6: Final answer
    x = 13,636.50

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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.