Home / 21,000,685.60-31,438,042.80-12,476,634.40

Finding the Fourth Proportional to 21,000,685.60, 31,438,042.80 and 12,476,634.40

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Solution

The fourth proportional to 21,000,685.60, 31,438,042.80 and 12,476,634.40 is: 18,677,531.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000,685.60 : 31,438,042.80 = 12,476,634.40 : x
  2. Step 2: Convert to fraction form
    21,000,685.60/31,438,042.80 = 12,476,634.40/x
  3. Step 3: Cross multiply
    21,000,685.60x = 31,438,042.80 × 12,476,634.40
  4. Step 4: Simplify right side
    21,000,685.60x = 392,240,966,267,152.31
  5. Step 5: Solve for x
    x = 392,240,966,267,152.31/21,000,685.60
  6. Step 6: Final answer
    x = 18,677,531.47

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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.