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Finding the Fourth Proportional to 14,478.75, 19,979.28 and 8,105.01

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Solution

The fourth proportional to 14,478.75, 19,979.28 and 8,105.01 is: 11,184.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,478.75 : 19,979.28 = 8,105.01 : x
  2. Step 2: Convert to fraction form
    14,478.75/19,979.28 = 8,105.01/x
  3. Step 3: Cross multiply
    14,478.75x = 19,979.28 × 8,105.01
  4. Step 4: Simplify right side
    14,478.75x = 161,932,264.19
  5. Step 5: Solve for x
    x = 161,932,264.19/14,478.75
  6. Step 6: Final answer
    x = 11,184.13

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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.