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Finding the Fourth Proportional to 21,976,030.40, 32,978,042.40 and 12,878,110.40

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Solution

The fourth proportional to 21,976,030.40, 32,978,042.40 and 12,878,110.40 is: 19,325,367.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,976,030.40 : 32,978,042.40 = 12,878,110.40 : x
  2. Step 2: Convert to fraction form
    21,976,030.40/32,978,042.40 = 12,878,110.40/x
  3. Step 3: Cross multiply
    21,976,030.40x = 32,978,042.40 × 12,878,110.40
  4. Step 4: Simplify right side
    21,976,030.40x = 424,694,870,803,080.94
  5. Step 5: Solve for x
    x = 424,694,870,803,080.94/21,976,030.40
  6. Step 6: Final answer
    x = 19,325,367.82

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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.