Home / 21,780,138.80-32,670,208.20-18,378,916.40

Finding the Fourth Proportional to 21,780,138.80, 32,670,208.20 and 18,378,916.40

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Solution

The fourth proportional to 21,780,138.80, 32,670,208.20 and 18,378,916.40 is: 27,568,374.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780,138.80 : 32,670,208.20 = 18,378,916.40 : x
  2. Step 2: Convert to fraction form
    21,780,138.80/32,670,208.20 = 18,378,916.40/x
  3. Step 3: Cross multiply
    21,780,138.80x = 32,670,208.20 × 18,378,916.40
  4. Step 4: Simplify right side
    21,780,138.80x = 600,443,025,278,394.38
  5. Step 5: Solve for x
    x = 600,443,025,278,394.38/21,780,138.80
  6. Step 6: Final answer
    x = 27,568,374.60

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1.5x scale

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.