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Finding the Fourth Proportional to 27,307.80, 40,932.90 and 10,661.40

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Solution

The fourth proportional to 27,307.80, 40,932.90 and 10,661.40 is: 15,980.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,307.80 : 40,932.90 = 10,661.40 : x
  2. Step 2: Convert to fraction form
    27,307.80/40,932.90 = 10,661.40/x
  3. Step 3: Cross multiply
    27,307.80x = 40,932.90 × 10,661.40
  4. Step 4: Simplify right side
    27,307.80x = 436,402,020.06
  5. Step 5: Solve for x
    x = 436,402,020.06/27,307.80
  6. Step 6: Final answer
    x = 15,980.86

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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.