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Finding the Fourth Proportional to 28,008,337.80, 42,012,506.70 and 7,813,579.80

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Solution

The fourth proportional to 28,008,337.80, 42,012,506.70 and 7,813,579.80 is: 11,720,369.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,008,337.80 : 42,012,506.70 = 7,813,579.80 : x
  2. Step 2: Convert to fraction form
    28,008,337.80/42,012,506.70 = 7,813,579.80/x
  3. Step 3: Cross multiply
    28,008,337.80x = 42,012,506.70 × 7,813,579.80
  4. Step 4: Simplify right side
    28,008,337.80x = 328,268,073,698,484.69
  5. Step 5: Solve for x
    x = 328,268,073,698,484.69/28,008,337.80
  6. Step 6: Final answer
    x = 11,720,369.70

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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.