Home / 39,785.50-54,903.99-21,881.67

Finding the Fourth Proportional to 39,785.50, 54,903.99 and 21,881.67

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Solution

The fourth proportional to 39,785.50, 54,903.99 and 21,881.67 is: 30,196.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,785.50 : 54,903.99 = 21,881.67 : x
  2. Step 2: Convert to fraction form
    39,785.50/54,903.99 = 21,881.67/x
  3. Step 3: Cross multiply
    39,785.50x = 54,903.99 × 21,881.67
  4. Step 4: Simplify right side
    39,785.50x = 1,201,390,990.86
  5. Step 5: Solve for x
    x = 1,201,390,990.86/39,785.50
  6. Step 6: Final answer
    x = 30,196.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.