Home / 21,002,687.60-31,504,031.40-12,478,636.40

Finding the Fourth Proportional to 21,002,687.60, 31,504,031.40 and 12,478,636.40

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Solution

The fourth proportional to 21,002,687.60, 31,504,031.40 and 12,478,636.40 is: 18,717,954.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002,687.60 : 31,504,031.40 = 12,478,636.40 : x
  2. Step 2: Convert to fraction form
    21,002,687.60/31,504,031.40 = 12,478,636.40/x
  3. Step 3: Cross multiply
    21,002,687.60x = 31,504,031.40 × 12,478,636.40
  4. Step 4: Simplify right side
    21,002,687.60x = 393,127,352,974,782.94
  5. Step 5: Solve for x
    x = 393,127,352,974,782.94/21,002,687.60
  6. Step 6: Final answer
    x = 18,717,954.60

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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.