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Finding the Fourth Proportional to 39,851.99, 59,785.87 and 11,389.20

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Solution

The fourth proportional to 39,851.99, 59,785.87 and 11,389.20 is: 17,086.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,851.99 : 59,785.87 = 11,389.20 : x
  2. Step 2: Convert to fraction form
    39,851.99/59,785.87 = 11,389.20/x
  3. Step 3: Cross multiply
    39,851.99x = 59,785.87 × 11,389.20
  4. Step 4: Simplify right side
    39,851.99x = 680,912,967.26
  5. Step 5: Solve for x
    x = 680,912,967.26/39,851.99
  6. Step 6: Final answer
    x = 17,086.05

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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.