Home / 39,389.83-54,358.14-21,485.22

Finding the Fourth Proportional to 39,389.83, 54,358.14 and 21,485.22

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Solution

The fourth proportional to 39,389.83, 54,358.14 and 21,485.22 is: 29,649.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,389.83 : 54,358.14 = 21,485.22 : x
  2. Step 2: Convert to fraction form
    39,389.83/54,358.14 = 21,485.22/x
  3. Step 3: Cross multiply
    39,389.83x = 54,358.14 × 21,485.22
  4. Step 4: Simplify right side
    39,389.83x = 1,167,896,879.19
  5. Step 5: Solve for x
    x = 1,167,896,879.19/39,389.83
  6. Step 6: Final answer
    x = 29,649.70

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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.