Home / 31,409.83-43,339.38-18,666.91

Finding the Fourth Proportional to 31,409.83, 43,339.38 and 18,666.91

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Solution

The fourth proportional to 31,409.83, 43,339.38 and 18,666.91 is: 25,756.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,409.83 : 43,339.38 = 18,666.91 : x
  2. Step 2: Convert to fraction form
    31,409.83/43,339.38 = 18,666.91/x
  3. Step 3: Cross multiply
    31,409.83x = 43,339.38 × 18,666.91
  4. Step 4: Simplify right side
    31,409.83x = 809,012,089.22
  5. Step 5: Solve for x
    x = 809,012,089.22/31,409.83
  6. Step 6: Final answer
    x = 25,756.66

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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.