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Finding the Fourth Proportional to 30,708.76, 42,374.65 and 17,279.74

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Solution

The fourth proportional to 30,708.76, 42,374.65 and 17,279.74 is: 23,844.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,708.76 : 42,374.65 = 17,279.74 : x
  2. Step 2: Convert to fraction form
    30,708.76/42,374.65 = 17,279.74/x
  3. Step 3: Cross multiply
    30,708.76x = 42,374.65 × 17,279.74
  4. Step 4: Simplify right side
    30,708.76x = 732,222,934.59
  5. Step 5: Solve for x
    x = 732,222,934.59/30,708.76
  6. Step 6: Final answer
    x = 23,844.11

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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.