Home / 11,885.28-16,401.60-7,172.16

Finding the Fourth Proportional to 11,885.28, 16,401.60 and 7,172.16

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Solution

The fourth proportional to 11,885.28, 16,401.60 and 7,172.16 is: 9,897.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,885.28 : 16,401.60 = 7,172.16 : x
  2. Step 2: Convert to fraction form
    11,885.28/16,401.60 = 7,172.16/x
  3. Step 3: Cross multiply
    11,885.28x = 16,401.60 × 7,172.16
  4. Step 4: Simplify right side
    11,885.28x = 117,634,899.46
  5. Step 5: Solve for x
    x = 117,634,899.46/11,885.28
  6. Step 6: Final answer
    x = 9,897.53

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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.