Home / 38,700.88-53,407.82-21,708.90

Finding the Fourth Proportional to 38,700.88, 53,407.82 and 21,708.90

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Solution

The fourth proportional to 38,700.88, 53,407.82 and 21,708.90 is: 29,958.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,700.88 : 53,407.82 = 21,708.90 : x
  2. Step 2: Convert to fraction form
    38,700.88/53,407.82 = 21,708.90/x
  3. Step 3: Cross multiply
    38,700.88x = 53,407.82 × 21,708.90
  4. Step 4: Simplify right side
    38,700.88x = 1,159,425,077.87
  5. Step 5: Solve for x
    x = 1,159,425,077.87/38,700.88
  6. Step 6: Final answer
    x = 29,958.63

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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.