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Finding the Fourth Proportional to 8,587,880.80, 12,881,821.20 and 8,219,298.40

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Solution

The fourth proportional to 8,587,880.80, 12,881,821.20 and 8,219,298.40 is: 12,328,947.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,587,880.80 : 12,881,821.20 = 8,219,298.40 : x
  2. Step 2: Convert to fraction form
    8,587,880.80/12,881,821.20 = 8,219,298.40/x
  3. Step 3: Cross multiply
    8,587,880.80x = 12,881,821.20 × 8,219,298.40
  4. Step 4: Simplify right side
    8,587,880.80x = 105,879,532,378,246.08
  5. Step 5: Solve for x
    x = 105,879,532,378,246.08/8,587,880.80
  6. Step 6: Final answer
    x = 12,328,947.60

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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.