Home / 21,426-29,535.48-18,425.76

Finding the Fourth Proportional to 21,426, 29,535.48 and 18,425.76

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Solution

The fourth proportional to 21,426, 29,535.48 and 18,425.76 is: 25,399.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,426 : 29,535.48 = 18,425.76 : x
  2. Step 2: Convert to fraction form
    21,426/29,535.48 = 18,425.76/x
  3. Step 3: Cross multiply
    21,426x = 29,535.48 × 18,425.76
  4. Step 4: Simplify right side
    21,426x = 544,213,665.96
  5. Step 5: Solve for x
    x = 544,213,665.96/21,426
  6. Step 6: Final answer
    x = 25,399.69

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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.