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Finding the Fourth Proportional to 18,429,978.36, 25,438,428.36 and 10,697,511.81

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Solution

The fourth proportional to 18,429,978.36, 25,438,428.36 and 10,697,511.81 is: 14,765,502.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,429,978.36 : 25,438,428.36 = 10,697,511.81 : x
  2. Step 2: Convert to fraction form
    18,429,978.36/25,438,428.36 = 10,697,511.81/x
  3. Step 3: Cross multiply
    18,429,978.36x = 25,438,428.36 × 10,697,511.81
  4. Step 4: Simplify right side
    18,429,978.36x = 272,127,887,808,938.94
  5. Step 5: Solve for x
    x = 272,127,887,808,938.94/18,429,978.36
  6. Step 6: Final answer
    x = 14,765,502.30

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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.