Home / 39,020.57-53,848.22-21,115.59

Finding the Fourth Proportional to 39,020.57, 53,848.22 and 21,115.59

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Solution

The fourth proportional to 39,020.57, 53,848.22 and 21,115.59 is: 29,139.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,020.57 : 53,848.22 = 21,115.59 : x
  2. Step 2: Convert to fraction form
    39,020.57/53,848.22 = 21,115.59/x
  3. Step 3: Cross multiply
    39,020.57x = 53,848.22 × 21,115.59
  4. Step 4: Simplify right side
    39,020.57x = 1,137,036,830.17
  5. Step 5: Solve for x
    x = 1,137,036,830.17/39,020.57
  6. Step 6: Final answer
    x = 29,139.43

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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.