Home / 21,814.18-30,090.09-15,528.58

Finding the Fourth Proportional to 21,814.18, 30,090.09 and 15,528.58

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Solution

The fourth proportional to 21,814.18, 30,090.09 and 15,528.58 is: 21,419.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,814.18 : 30,090.09 = 15,528.58 : x
  2. Step 2: Convert to fraction form
    21,814.18/30,090.09 = 15,528.58/x
  3. Step 3: Cross multiply
    21,814.18x = 30,090.09 × 15,528.58
  4. Step 4: Simplify right side
    21,814.18x = 467,256,369.77
  5. Step 5: Solve for x
    x = 467,256,369.77/21,814.18
  6. Step 6: Final answer
    x = 21,419.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.