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Finding the Fourth Proportional to 28,609.16, 42,913.77 and 11,960.08

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Solution

The fourth proportional to 28,609.16, 42,913.77 and 11,960.08 is: 17,940.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,609.16 : 42,913.77 = 11,960.08 : x
  2. Step 2: Convert to fraction form
    28,609.16/42,913.77 = 11,960.08/x
  3. Step 3: Cross multiply
    28,609.16x = 42,913.77 × 11,960.08
  4. Step 4: Simplify right side
    28,609.16x = 513,251,970.17
  5. Step 5: Solve for x
    x = 513,251,970.17/28,609.16
  6. Step 6: Final answer
    x = 17,940.13

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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.