Home / 28,419.46-39,204.42-21,693.40

Finding the Fourth Proportional to 28,419.46, 39,204.42 and 21,693.40

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Solution

The fourth proportional to 28,419.46, 39,204.42 and 21,693.40 is: 29,925.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,419.46 : 39,204.42 = 21,693.40 : x
  2. Step 2: Convert to fraction form
    28,419.46/39,204.42 = 21,693.40/x
  3. Step 3: Cross multiply
    28,419.46x = 39,204.42 × 21,693.40
  4. Step 4: Simplify right side
    28,419.46x = 850,477,164.83
  5. Step 5: Solve for x
    x = 850,477,164.83/28,419.46
  6. Step 6: Final answer
    x = 29,925.87

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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.