Home / 21,287,766.40-29,368,781.76-13,124,832.64

Finding the Fourth Proportional to 21,287,766.40, 29,368,781.76 and 13,124,832.64

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Solution

The fourth proportional to 21,287,766.40, 29,368,781.76 and 13,124,832.64 is: 18,107,129.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287,766.40 : 29,368,781.76 = 13,124,832.64 : x
  2. Step 2: Convert to fraction form
    21,287,766.40/29,368,781.76 = 13,124,832.64/x
  3. Step 3: Cross multiply
    21,287,766.40x = 29,368,781.76 × 13,124,832.64
  4. Step 4: Simplify right side
    21,287,766.40x = 385,460,345,440,684.69
  5. Step 5: Solve for x
    x = 385,460,345,440,684.69/21,287,766.40
  6. Step 6: Final answer
    x = 18,107,129.62

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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.