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Finding the Fourth Proportional to 8,992,509.76, 12,408,913.40 and 5,072,049.84

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Solution

The fourth proportional to 8,992,509.76, 12,408,913.40 and 5,072,049.84 is: 6,999,005.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,992,509.76 : 12,408,913.40 = 5,072,049.84 : x
  2. Step 2: Convert to fraction form
    8,992,509.76/12,408,913.40 = 5,072,049.84/x
  3. Step 3: Cross multiply
    8,992,509.76x = 12,408,913.40 × 5,072,049.84
  4. Step 4: Simplify right side
    8,992,509.76x = 62,938,627,225,043.86
  5. Step 5: Solve for x
    x = 62,938,627,225,043.86/8,992,509.76
  6. Step 6: Final answer
    x = 6,999,005.72

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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.