Home / 21,079.32-31,629.92-9,389.81

Finding the Fourth Proportional to 21,079.32, 31,629.92 and 9,389.81

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Solution

The fourth proportional to 21,079.32, 31,629.92 and 9,389.81 is: 14,089.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,079.32 : 31,629.92 = 9,389.81 : x
  2. Step 2: Convert to fraction form
    21,079.32/31,629.92 = 9,389.81/x
  3. Step 3: Cross multiply
    21,079.32x = 31,629.92 × 9,389.81
  4. Step 4: Simplify right side
    21,079.32x = 296,998,734.02
  5. Step 5: Solve for x
    x = 296,998,734.02/21,079.32
  6. Step 6: Final answer
    x = 14,089.58

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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.