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Finding the Fourth Proportional to 19,926,510.30, 29,889,765.45 and 7,142,401.80

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Solution

The fourth proportional to 19,926,510.30, 29,889,765.45 and 7,142,401.80 is: 10,713,602.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,926,510.30 : 29,889,765.45 = 7,142,401.80 : x
  2. Step 2: Convert to fraction form
    19,926,510.30/29,889,765.45 = 7,142,401.80/x
  3. Step 3: Cross multiply
    19,926,510.30x = 29,889,765.45 × 7,142,401.80
  4. Step 4: Simplify right side
    19,926,510.30x = 213,484,714,551,657.81
  5. Step 5: Solve for x
    x = 213,484,714,551,657.81/19,926,510.30
  6. Step 6: Final answer
    x = 10,713,602.70

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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.