Home / 20,798.13-31,197.06-5,215.71

Finding the Fourth Proportional to 20,798.13, 31,197.06 and 5,215.71

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Solution

The fourth proportional to 20,798.13, 31,197.06 and 5,215.71 is: 7,823.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,798.13 : 31,197.06 = 5,215.71 : x
  2. Step 2: Convert to fraction form
    20,798.13/31,197.06 = 5,215.71/x
  3. Step 3: Cross multiply
    20,798.13x = 31,197.06 × 5,215.71
  4. Step 4: Simplify right side
    20,798.13x = 162,714,817.81
  5. Step 5: Solve for x
    x = 162,714,817.81/20,798.13
  6. Step 6: Final answer
    x = 7,823.53

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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.