Home / 28,355.81-39,132.72-16,422.89

Finding the Fourth Proportional to 28,355.81, 39,132.72 and 16,422.89

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Solution

The fourth proportional to 28,355.81, 39,132.72 and 16,422.89 is: 22,664.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,355.81 : 39,132.72 = 16,422.89 : x
  2. Step 2: Convert to fraction form
    28,355.81/39,132.72 = 16,422.89/x
  3. Step 3: Cross multiply
    28,355.81x = 39,132.72 × 16,422.89
  4. Step 4: Simplify right side
    28,355.81x = 642,672,160.30
  5. Step 5: Solve for x
    x = 642,672,160.30/28,355.81
  6. Step 6: Final answer
    x = 22,664.57

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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.