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Finding the Fourth Proportional to 12,849,539.60, 19,264,978.20 and 5,272,605.20

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Solution

The fourth proportional to 12,849,539.60, 19,264,978.20 and 5,272,605.20 is: 7,905,078.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,849,539.60 : 19,264,978.20 = 5,272,605.20 : x
  2. Step 2: Convert to fraction form
    12,849,539.60/19,264,978.20 = 5,272,605.20/x
  3. Step 3: Cross multiply
    12,849,539.60x = 19,264,978.20 × 5,272,605.20
  4. Step 4: Simplify right side
    12,849,539.60x = 101,576,624,235,206.64
  5. Step 5: Solve for x
    x = 101,576,624,235,206.64/12,849,539.60
  6. Step 6: Final answer
    x = 7,905,078.89

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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.