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Finding the Fourth Proportional to 28,612,916.80, 42,807,400.80 and 18,535,220.80

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Solution

The fourth proportional to 28,612,916.80, 42,807,400.80 and 18,535,220.80 is: 27,730,295.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,612,916.80 : 42,807,400.80 = 18,535,220.80 : x
  2. Step 2: Convert to fraction form
    28,612,916.80/42,807,400.80 = 18,535,220.80/x
  3. Step 3: Cross multiply
    28,612,916.80x = 42,807,400.80 × 18,535,220.80
  4. Step 4: Simplify right side
    28,612,916.80x = 793,444,625,702,096.62
  5. Step 5: Solve for x
    x = 793,444,625,702,096.62/28,612,916.80
  6. Step 6: Final answer
    x = 27,730,295.07

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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.