Home / 20,895.80-31,343.70-12,601.40

Finding the Fourth Proportional to 20,895.80, 31,343.70 and 12,601.40

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Solution

The fourth proportional to 20,895.80, 31,343.70 and 12,601.40 is: 18,902.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,895.80 : 31,343.70 = 12,601.40 : x
  2. Step 2: Convert to fraction form
    20,895.80/31,343.70 = 12,601.40/x
  3. Step 3: Cross multiply
    20,895.80x = 31,343.70 × 12,601.40
  4. Step 4: Simplify right side
    20,895.80x = 394,974,501.18
  5. Step 5: Solve for x
    x = 394,974,501.18/20,895.80
  6. Step 6: Final answer
    x = 18,902.10

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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.