Home / 20,728.40-31,092.60-14,386.10

Finding the Fourth Proportional to 20,728.40, 31,092.60 and 14,386.10

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Solution

The fourth proportional to 20,728.40, 31,092.60 and 14,386.10 is: 21,579.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.40 : 31,092.60 = 14,386.10 : x
  2. Step 2: Convert to fraction form
    20,728.40/31,092.60 = 14,386.10/x
  3. Step 3: Cross multiply
    20,728.40x = 31,092.60 × 14,386.10
  4. Step 4: Simplify right side
    20,728.40x = 447,301,252.86
  5. Step 5: Solve for x
    x = 447,301,252.86/20,728.40
  6. Step 6: Final answer
    x = 21,579.15

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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.