Home / 38,420.10-53,016.12-21,422.70

Finding the Fourth Proportional to 38,420.10, 53,016.12 and 21,422.70

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Solution

The fourth proportional to 38,420.10, 53,016.12 and 21,422.70 is: 29,561.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,420.10 : 53,016.12 = 21,422.70 : x
  2. Step 2: Convert to fraction form
    38,420.10/53,016.12 = 21,422.70/x
  3. Step 3: Cross multiply
    38,420.10x = 53,016.12 × 21,422.70
  4. Step 4: Simplify right side
    38,420.10x = 1,135,748,433.92
  5. Step 5: Solve for x
    x = 1,135,748,433.92/38,420.10
  6. Step 6: Final answer
    x = 29,561.31

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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.