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Finding the Fourth Proportional to 15,785,798, 21,784,401.28 and 8,542,454

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Solution

The fourth proportional to 15,785,798, 21,784,401.28 and 8,542,454 is: 11,788,586.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,785,798 : 21,784,401.28 = 8,542,454 : x
  2. Step 2: Convert to fraction form
    15,785,798/21,784,401.28 = 8,542,454/x
  3. Step 3: Cross multiply
    15,785,798x = 21,784,401.28 × 8,542,454
  4. Step 4: Simplify right side
    15,785,798x = 186,092,245,851,941.12
  5. Step 5: Solve for x
    x = 186,092,245,851,941.12/15,785,798
  6. Step 6: Final answer
    x = 11,788,586.54

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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.