Home / 21,885.00-30,164.99-15,503.42

Finding the Fourth Proportional to 21,885.00, 30,164.99 and 15,503.42

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Solution

The fourth proportional to 21,885.00, 30,164.99 and 15,503.42 is: 21,368.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,885.00 : 30,164.99 = 15,503.42 : x
  2. Step 2: Convert to fraction form
    21,885.00/30,164.99 = 15,503.42/x
  3. Step 3: Cross multiply
    21,885.00x = 30,164.99 × 15,503.42
  4. Step 4: Simplify right side
    21,885.00x = 467,660,424.69
  5. Step 5: Solve for x
    x = 467,660,424.69/21,885.00
  6. Step 6: Final answer
    x = 21,368.99

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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.