Home / 20,869.56-31,312.35-12,555.54

Finding the Fourth Proportional to 20,869.56, 31,312.35 and 12,555.54

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Solution

The fourth proportional to 20,869.56, 31,312.35 and 12,555.54 is: 18,838.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.56 : 31,312.35 = 12,555.54 : x
  2. Step 2: Convert to fraction form
    20,869.56/31,312.35 = 12,555.54/x
  3. Step 3: Cross multiply
    20,869.56x = 31,312.35 × 12,555.54
  4. Step 4: Simplify right side
    20,869.56x = 393,143,462.92
  5. Step 5: Solve for x
    x = 393,143,462.92/20,869.56
  6. Step 6: Final answer
    x = 18,838.13

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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.