Home / 13,929.64-20,870.92-6,900.28

Finding the Fourth Proportional to 13,929.64, 20,870.92 and 6,900.28

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Solution

The fourth proportional to 13,929.64, 20,870.92 and 6,900.28 is: 10,338.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,929.64 : 20,870.92 = 6,900.28 : x
  2. Step 2: Convert to fraction form
    13,929.64/20,870.92 = 6,900.28/x
  3. Step 3: Cross multiply
    13,929.64x = 20,870.92 × 6,900.28
  4. Step 4: Simplify right side
    13,929.64x = 144,015,191.86
  5. Step 5: Solve for x
    x = 144,015,191.86/13,929.64
  6. Step 6: Final answer
    x = 10,338.76

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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.