Home / 30,711.29-42,360.37-18,780.49

Finding the Fourth Proportional to 30,711.29, 42,360.37 and 18,780.49

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Solution

The fourth proportional to 30,711.29, 42,360.37 and 18,780.49 is: 25,904.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,711.29 : 42,360.37 = 18,780.49 : x
  2. Step 2: Convert to fraction form
    30,711.29/42,360.37 = 18,780.49/x
  3. Step 3: Cross multiply
    30,711.29x = 42,360.37 × 18,780.49
  4. Step 4: Simplify right side
    30,711.29x = 795,548,511.18
  5. Step 5: Solve for x
    x = 795,548,511.18/30,711.29
  6. Step 6: Final answer
    x = 25,904.11

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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.