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Finding the Fourth Proportional to 18,465.71, 27,696.12 and 5,139.59

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Solution

The fourth proportional to 18,465.71, 27,696.12 and 5,139.59 is: 7,708.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,465.71 : 27,696.12 = 5,139.59 : x
  2. Step 2: Convert to fraction form
    18,465.71/27,696.12 = 5,139.59/x
  3. Step 3: Cross multiply
    18,465.71x = 27,696.12 × 5,139.59
  4. Step 4: Simplify right side
    18,465.71x = 142,346,701.39
  5. Step 5: Solve for x
    x = 142,346,701.39/18,465.71
  6. Step 6: Final answer
    x = 7,708.70

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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.