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Finding the Fourth Proportional to 20,272,953.64, 27,978,682.74 and 11,572,434.76

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Solution

The fourth proportional to 20,272,953.64, 27,978,682.74 and 11,572,434.76 is: 15,971,105.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,272,953.64 : 27,978,682.74 = 11,572,434.76 : x
  2. Step 2: Convert to fraction form
    20,272,953.64/27,978,682.74 = 11,572,434.76/x
  3. Step 3: Cross multiply
    20,272,953.64x = 27,978,682.74 × 11,572,434.76
  4. Step 4: Simplify right side
    20,272,953.64x = 323,781,480,679,388
  5. Step 5: Solve for x
    x = 323,781,480,679,388/20,272,953.64
  6. Step 6: Final answer
    x = 15,971,105.47

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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.