Home / 21,090.84-31,633.83-5,509.68

Finding the Fourth Proportional to 21,090.84, 31,633.83 and 5,509.68

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Solution

The fourth proportional to 21,090.84, 31,633.83 and 5,509.68 is: 8,263.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.84 : 31,633.83 = 5,509.68 : x
  2. Step 2: Convert to fraction form
    21,090.84/31,633.83 = 5,509.68/x
  3. Step 3: Cross multiply
    21,090.84x = 31,633.83 × 5,509.68
  4. Step 4: Simplify right side
    21,090.84x = 174,292,280.47
  5. Step 5: Solve for x
    x = 174,292,280.47/21,090.84
  6. Step 6: Final answer
    x = 8,263.89

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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.