Home / 30,871.11-46,317.75-12,140.78

Finding the Fourth Proportional to 30,871.11, 46,317.75 and 12,140.78

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Solution

The fourth proportional to 30,871.11, 46,317.75 and 12,140.78 is: 18,215.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,871.11 : 46,317.75 = 12,140.78 : x
  2. Step 2: Convert to fraction form
    30,871.11/46,317.75 = 12,140.78/x
  3. Step 3: Cross multiply
    30,871.11x = 46,317.75 × 12,140.78
  4. Step 4: Simplify right side
    30,871.11x = 562,333,381.26
  5. Step 5: Solve for x
    x = 562,333,381.26/30,871.11
  6. Step 6: Final answer
    x = 18,215.52

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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.