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Finding the Fourth Proportional to 13,247,985.70, 19,871,978.55 and 13,164,004.90

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Solution

The fourth proportional to 13,247,985.70, 19,871,978.55 and 13,164,004.90 is: 19,746,007.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,247,985.70 : 19,871,978.55 = 13,164,004.90 : x
  2. Step 2: Convert to fraction form
    13,247,985.70/19,871,978.55 = 13,164,004.90/x
  3. Step 3: Cross multiply
    13,247,985.70x = 19,871,978.55 × 13,164,004.90
  4. Step 4: Simplify right side
    13,247,985.70x = 261,594,823,004,894.91
  5. Step 5: Solve for x
    x = 261,594,823,004,894.91/13,247,985.70
  6. Step 6: Final answer
    x = 19,746,007.35

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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.