Home / 28,972.40-43,458.60-19,641.20

Finding the Fourth Proportional to 28,972.40, 43,458.60 and 19,641.20

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Solution

The fourth proportional to 28,972.40, 43,458.60 and 19,641.20 is: 29,461.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,972.40 : 43,458.60 = 19,641.20 : x
  2. Step 2: Convert to fraction form
    28,972.40/43,458.60 = 19,641.20/x
  3. Step 3: Cross multiply
    28,972.40x = 43,458.60 × 19,641.20
  4. Step 4: Simplify right side
    28,972.40x = 853,579,054.32
  5. Step 5: Solve for x
    x = 853,579,054.32/28,972.40
  6. Step 6: Final answer
    x = 29,461.80

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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.