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Finding the Fourth Proportional to 9,368,676.61, 12,928,700.65 and 5,238,715.74

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Solution

The fourth proportional to 9,368,676.61, 12,928,700.65 and 5,238,715.74 is: 7,229,386.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,368,676.61 : 12,928,700.65 = 5,238,715.74 : x
  2. Step 2: Convert to fraction form
    9,368,676.61/12,928,700.65 = 5,238,715.74/x
  3. Step 3: Cross multiply
    9,368,676.61x = 12,928,700.65 × 5,238,715.74
  4. Step 4: Simplify right side
    9,368,676.61x = 67,729,787,592,903.23
  5. Step 5: Solve for x
    x = 67,729,787,592,903.23/9,368,676.61
  6. Step 6: Final answer
    x = 7,229,386.86

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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.