Home / 28,390.12-39,116.39-18,942.28

Finding the Fourth Proportional to 28,390.12, 39,116.39 and 18,942.28

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Solution

The fourth proportional to 28,390.12, 39,116.39 and 18,942.28 is: 26,098.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,390.12 : 39,116.39 = 18,942.28 : x
  2. Step 2: Convert to fraction form
    28,390.12/39,116.39 = 18,942.28/x
  3. Step 3: Cross multiply
    28,390.12x = 39,116.39 × 18,942.28
  4. Step 4: Simplify right side
    28,390.12x = 740,953,419.47
  5. Step 5: Solve for x
    x = 740,953,419.47/28,390.12
  6. Step 6: Final answer
    x = 26,098.99

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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.