Home / 38,712.40-53,421.60-21,945.04

Finding the Fourth Proportional to 38,712.40, 53,421.60 and 21,945.04

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Solution

The fourth proportional to 38,712.40, 53,421.60 and 21,945.04 is: 30,283.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,712.40 : 53,421.60 = 21,945.04 : x
  2. Step 2: Convert to fraction form
    38,712.40/53,421.60 = 21,945.04/x
  3. Step 3: Cross multiply
    38,712.40x = 53,421.60 × 21,945.04
  4. Step 4: Simplify right side
    38,712.40x = 1,172,339,148.86
  5. Step 5: Solve for x
    x = 1,172,339,148.86/38,712.40
  6. Step 6: Final answer
    x = 30,283.30

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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.