Home / 28,421.46-39,207.18-21,695.40

Finding the Fourth Proportional to 28,421.46, 39,207.18 and 21,695.40

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Solution

The fourth proportional to 28,421.46, 39,207.18 and 21,695.40 is: 29,928.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,421.46 : 39,207.18 = 21,695.40 : x
  2. Step 2: Convert to fraction form
    28,421.46/39,207.18 = 21,695.40/x
  3. Step 3: Cross multiply
    28,421.46x = 39,207.18 × 21,695.40
  4. Step 4: Simplify right side
    28,421.46x = 850,615,452.97
  5. Step 5: Solve for x
    x = 850,615,452.97/28,421.46
  6. Step 6: Final answer
    x = 29,928.63

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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.