Home / 20,830.64-31,267.56-13,953.20

Finding the Fourth Proportional to 20,830.64, 31,267.56 and 13,953.20

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Solution

The fourth proportional to 20,830.64, 31,267.56 and 13,953.20 is: 20,944.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.64 : 31,267.56 = 13,953.20 : x
  2. Step 2: Convert to fraction form
    20,830.64/31,267.56 = 13,953.20/x
  3. Step 3: Cross multiply
    20,830.64x = 31,267.56 × 13,953.20
  4. Step 4: Simplify right side
    20,830.64x = 436,282,518.19
  5. Step 5: Solve for x
    x = 436,282,518.19/20,830.64
  6. Step 6: Final answer
    x = 20,944.27

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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.