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Finding the Fourth Proportional to 10,492.56, 14,480 and 5,712.80

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Solution

The fourth proportional to 10,492.56, 14,480 and 5,712.80 is: 7,883.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,492.56 : 14,480 = 5,712.80 : x
  2. Step 2: Convert to fraction form
    10,492.56/14,480 = 5,712.80/x
  3. Step 3: Cross multiply
    10,492.56x = 14,480 × 5,712.80
  4. Step 4: Simplify right side
    10,492.56x = 82,721,344
  5. Step 5: Solve for x
    x = 82,721,344/10,492.56
  6. Step 6: Final answer
    x = 7,883.81

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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.