Home / 21,316.61-29,416.91-11,885.15

Finding the Fourth Proportional to 21,316.61, 29,416.91 and 11,885.15

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Solution

The fourth proportional to 21,316.61, 29,416.91 and 11,885.15 is: 16,401.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,316.61 : 29,416.91 = 11,885.15 : x
  2. Step 2: Convert to fraction form
    21,316.61/29,416.91 = 11,885.15/x
  3. Step 3: Cross multiply
    21,316.61x = 29,416.91 × 11,885.15
  4. Step 4: Simplify right side
    21,316.61x = 349,624,181.38
  5. Step 5: Solve for x
    x = 349,624,181.38/21,316.61
  6. Step 6: Final answer
    x = 16,401.49

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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.