Home / 18,689,117.60-27,989,439.60-12,672,912.80

Finding the Fourth Proportional to 18,689,117.60, 27,989,439.60 and 12,672,912.80

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Solution

The fourth proportional to 18,689,117.60, 27,989,439.60 and 12,672,912.80 is: 18,979,372.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689,117.60 : 27,989,439.60 = 12,672,912.80 : x
  2. Step 2: Convert to fraction form
    18,689,117.60/27,989,439.60 = 12,672,912.80/x
  3. Step 3: Cross multiply
    18,689,117.60x = 27,989,439.60 × 12,672,912.80
  4. Step 4: Simplify right side
    18,689,117.60x = 354,707,727,371,666.94
  5. Step 5: Solve for x
    x = 354,707,727,371,666.94/18,689,117.60
  6. Step 6: Final answer
    x = 18,979,372.65

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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.