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Finding the Fourth Proportional to 12,602,856.40, 18,857,045.40 and 8,351,328.40

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Solution

The fourth proportional to 12,602,856.40, 18,857,045.40 and 8,351,328.40 is: 12,495,689.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,602,856.40 : 18,857,045.40 = 8,351,328.40 : x
  2. Step 2: Convert to fraction form
    12,602,856.40/18,857,045.40 = 8,351,328.40/x
  3. Step 3: Cross multiply
    12,602,856.40x = 18,857,045.40 × 8,351,328.40
  4. Step 4: Simplify right side
    12,602,856.40x = 157,481,378,789,109.34
  5. Step 5: Solve for x
    x = 157,481,378,789,109.34/12,602,856.40
  6. Step 6: Final answer
    x = 12,495,689.37

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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.