Home / 12,471,815.20-18,707,722.80-7,663,914.40

Finding the Fourth Proportional to 12,471,815.20, 18,707,722.80 and 7,663,914.40

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Solution

The fourth proportional to 12,471,815.20, 18,707,722.80 and 7,663,914.40 is: 11,495,871.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,471,815.20 : 18,707,722.80 = 7,663,914.40 : x
  2. Step 2: Convert to fraction form
    12,471,815.20/18,707,722.80 = 7,663,914.40/x
  3. Step 3: Cross multiply
    12,471,815.20x = 18,707,722.80 × 7,663,914.40
  4. Step 4: Simplify right side
    12,471,815.20x = 143,374,386,158,128.34
  5. Step 5: Solve for x
    x = 143,374,386,158,128.34/12,471,815.20
  6. Step 6: Final answer
    x = 11,495,871.60

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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.