Home / 39,790.99-59,686.56-13,138.47

Finding the Fourth Proportional to 39,790.99, 59,686.56 and 13,138.47

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Solution

The fourth proportional to 39,790.99, 59,686.56 and 13,138.47 is: 19,707.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,790.99 : 59,686.56 = 13,138.47 : x
  2. Step 2: Convert to fraction form
    39,790.99/59,686.56 = 13,138.47/x
  3. Step 3: Cross multiply
    39,790.99x = 59,686.56 × 13,138.47
  4. Step 4: Simplify right side
    39,790.99x = 784,190,028.69
  5. Step 5: Solve for x
    x = 784,190,028.69/39,790.99
  6. Step 6: Final answer
    x = 19,707.73

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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.