Home / 20,995.20-31,492.80-14,342.40

Finding the Fourth Proportional to 20,995.20, 31,492.80 and 14,342.40

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Solution

The fourth proportional to 20,995.20, 31,492.80 and 14,342.40 is: 21,513.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.20 : 31,492.80 = 14,342.40 : x
  2. Step 2: Convert to fraction form
    20,995.20/31,492.80 = 14,342.40/x
  3. Step 3: Cross multiply
    20,995.20x = 31,492.80 × 14,342.40
  4. Step 4: Simplify right side
    20,995.20x = 451,682,334.72
  5. Step 5: Solve for x
    x = 451,682,334.72/20,995.20
  6. Step 6: Final answer
    x = 21,513.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.