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Finding the Fourth Proportional to 21,761,886.60, 32,642,829.90 and 19,410,424.20

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Solution

The fourth proportional to 21,761,886.60, 32,642,829.90 and 19,410,424.20 is: 29,115,636.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,761,886.60 : 32,642,829.90 = 19,410,424.20 : x
  2. Step 2: Convert to fraction form
    21,761,886.60/32,642,829.90 = 19,410,424.20/x
  3. Step 3: Cross multiply
    21,761,886.60x = 32,642,829.90 × 19,410,424.20
  4. Step 4: Simplify right side
    21,761,886.60x = 633,611,175,447,443.50
  5. Step 5: Solve for x
    x = 633,611,175,447,443.50/21,761,886.60
  6. Step 6: Final answer
    x = 29,115,636.30

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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.