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Finding the Fourth Proportional to 28,000,916, 38,641,290 and 15,123,860

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Solution

The fourth proportional to 28,000,916, 38,641,290 and 15,123,860 is: 20,870,940.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,000,916 : 38,641,290 = 15,123,860 : x
  2. Step 2: Convert to fraction form
    28,000,916/38,641,290 = 15,123,860/x
  3. Step 3: Cross multiply
    28,000,916x = 38,641,290 × 15,123,860
  4. Step 4: Simplify right side
    28,000,916x = 584,405,460,179,400
  5. Step 5: Solve for x
    x = 584,405,460,179,400/28,000,916
  6. Step 6: Final answer
    x = 20,870,940.80

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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.