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Finding the Fourth Proportional to 25,720,978.51, 38,573,336.90 and 8,446,331.61

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Solution

The fourth proportional to 25,720,978.51, 38,573,336.90 and 8,446,331.61 is: 12,666,827.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,720,978.51 : 38,573,336.90 = 8,446,331.61 : x
  2. Step 2: Convert to fraction form
    25,720,978.51/38,573,336.90 = 8,446,331.61/x
  3. Step 3: Cross multiply
    25,720,978.51x = 38,573,336.90 × 8,446,331.61
  4. Step 4: Simplify right side
    25,720,978.51x = 325,803,194,719,417.75
  5. Step 5: Solve for x
    x = 325,803,194,719,417.75/25,720,978.51
  6. Step 6: Final answer
    x = 12,666,827.38

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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.