Home / 28,920.80-43,373.10-9,205.40

Finding the Fourth Proportional to 28,920.80, 43,373.10 and 9,205.40

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Solution

The fourth proportional to 28,920.80, 43,373.10 and 9,205.40 is: 13,805.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,920.80 : 43,373.10 = 9,205.40 : x
  2. Step 2: Convert to fraction form
    28,920.80/43,373.10 = 9,205.40/x
  3. Step 3: Cross multiply
    28,920.80x = 43,373.10 × 9,205.40
  4. Step 4: Simplify right side
    28,920.80x = 399,266,734.74
  5. Step 5: Solve for x
    x = 399,266,734.74/28,920.80
  6. Step 6: Final answer
    x = 13,805.52

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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.