Home / 38,785.50-53,523.99-21,121.50

Finding the Fourth Proportional to 38,785.50, 53,523.99 and 21,121.50

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Solution

The fourth proportional to 38,785.50, 53,523.99 and 21,121.50 is: 29,147.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,785.50 : 53,523.99 = 21,121.50 : x
  2. Step 2: Convert to fraction form
    38,785.50/53,523.99 = 21,121.50/x
  3. Step 3: Cross multiply
    38,785.50x = 53,523.99 × 21,121.50
  4. Step 4: Simplify right side
    38,785.50x = 1,130,506,954.79
  5. Step 5: Solve for x
    x = 1,130,506,954.79/38,785.50
  6. Step 6: Final answer
    x = 29,147.67

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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.