Home / 30,465.24-42,029.66-19,851

Finding the Fourth Proportional to 30,465.24, 42,029.66 and 19,851

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Solution

The fourth proportional to 30,465.24, 42,029.66 and 19,851 is: 27,386.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,465.24 : 42,029.66 = 19,851 : x
  2. Step 2: Convert to fraction form
    30,465.24/42,029.66 = 19,851/x
  3. Step 3: Cross multiply
    30,465.24x = 42,029.66 × 19,851
  4. Step 4: Simplify right side
    30,465.24x = 834,330,780.66
  5. Step 5: Solve for x
    x = 834,330,780.66/30,465.24
  6. Step 6: Final answer
    x = 27,386.32

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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.