Home / 20,218,730.20-30,328,095.30-12,565,979.80

Finding the Fourth Proportional to 20,218,730.20, 30,328,095.30 and 12,565,979.80

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Solution

The fourth proportional to 20,218,730.20, 30,328,095.30 and 12,565,979.80 is: 18,848,969.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218,730.20 : 30,328,095.30 = 12,565,979.80 : x
  2. Step 2: Convert to fraction form
    20,218,730.20/30,328,095.30 = 12,565,979.80/x
  3. Step 3: Cross multiply
    20,218,730.20x = 30,328,095.30 × 12,565,979.80
  4. Step 4: Simplify right side
    20,218,730.20x = 381,102,232,912,275
  5. Step 5: Solve for x
    x = 381,102,232,912,275/20,218,730.20
  6. Step 6: Final answer
    x = 18,848,969.70

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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.