Home / 38,720.34-53,440.29-21,958.74

Finding the Fourth Proportional to 38,720.34, 53,440.29 and 21,958.74

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Solution

The fourth proportional to 38,720.34, 53,440.29 and 21,958.74 is: 30,306.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,720.34 : 53,440.29 = 21,958.74 : x
  2. Step 2: Convert to fraction form
    38,720.34/53,440.29 = 21,958.74/x
  3. Step 3: Cross multiply
    38,720.34x = 53,440.29 × 21,958.74
  4. Step 4: Simplify right side
    38,720.34x = 1,173,481,433.63
  5. Step 5: Solve for x
    x = 1,173,481,433.63/38,720.34
  6. Step 6: Final answer
    x = 30,306.59

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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.