Home / 21,056,808.78-31,494,031.64-12,400,274.58

Finding the Fourth Proportional to 21,056,808.78, 31,494,031.64 and 12,400,274.58

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Solution

The fourth proportional to 21,056,808.78, 31,494,031.64 and 12,400,274.58 is: 18,546,715.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,056,808.78 : 31,494,031.64 = 12,400,274.58 : x
  2. Step 2: Convert to fraction form
    21,056,808.78/31,494,031.64 = 12,400,274.58/x
  3. Step 3: Cross multiply
    21,056,808.78x = 31,494,031.64 × 12,400,274.58
  4. Step 4: Simplify right side
    21,056,808.78x = 390,534,639,967,207.75
  5. Step 5: Solve for x
    x = 390,534,639,967,207.75/21,056,808.78
  6. Step 6: Final answer
    x = 18,546,715.41

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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.