Home / 39,033.40-53,866.23-21,128.39

Finding the Fourth Proportional to 39,033.40, 53,866.23 and 21,128.39

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Solution

The fourth proportional to 39,033.40, 53,866.23 and 21,128.39 is: 29,157.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,033.40 : 53,866.23 = 21,128.39 : x
  2. Step 2: Convert to fraction form
    39,033.40/53,866.23 = 21,128.39/x
  3. Step 3: Cross multiply
    39,033.40x = 53,866.23 × 21,128.39
  4. Step 4: Simplify right side
    39,033.40x = 1,138,106,445.94
  5. Step 5: Solve for x
    x = 1,138,106,445.94/39,033.40
  6. Step 6: Final answer
    x = 29,157.25

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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.