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Finding the Fourth Proportional to 13,693,054.72, 18,897,006.08 and 7,581,483.20

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Solution

The fourth proportional to 13,693,054.72, 18,897,006.08 and 7,581,483.20 is: 10,462,773.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,693,054.72 : 18,897,006.08 = 7,581,483.20 : x
  2. Step 2: Convert to fraction form
    13,693,054.72/18,897,006.08 = 7,581,483.20/x
  3. Step 3: Cross multiply
    13,693,054.72x = 18,897,006.08 × 7,581,483.20
  4. Step 4: Simplify right side
    13,693,054.72x = 143,267,334,125,817.84
  5. Step 5: Solve for x
    x = 143,267,334,125,817.84/13,693,054.72
  6. Step 6: Final answer
    x = 10,462,773.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.