Home / 15,504.40-21,395-9,215.60

Finding the Fourth Proportional to 15,504.40, 21,395 and 9,215.60

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Solution

The fourth proportional to 15,504.40, 21,395 and 9,215.60 is: 12,716.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,504.40 : 21,395 = 9,215.60 : x
  2. Step 2: Convert to fraction form
    15,504.40/21,395 = 9,215.60/x
  3. Step 3: Cross multiply
    15,504.40x = 21,395 × 9,215.60
  4. Step 4: Simplify right side
    15,504.40x = 197,167,762
  5. Step 5: Solve for x
    x = 197,167,762/15,504.40
  6. Step 6: Final answer
    x = 12,716.89

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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.