Home / 21,403.20-29,564.63-16,428.89

Finding the Fourth Proportional to 21,403.20, 29,564.63 and 16,428.89

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Solution

The fourth proportional to 21,403.20, 29,564.63 and 16,428.89 is: 22,693.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,403.20 : 29,564.63 = 16,428.89 : x
  2. Step 2: Convert to fraction form
    21,403.20/29,564.63 = 16,428.89/x
  3. Step 3: Cross multiply
    21,403.20x = 29,564.63 × 16,428.89
  4. Step 4: Simplify right side
    21,403.20x = 485,713,947.41
  5. Step 5: Solve for x
    x = 485,713,947.41/21,403.20
  6. Step 6: Final answer
    x = 22,693.52

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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.