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Finding the Fourth Proportional to 14,351.55, 19,805.03 and 7,978.13

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Solution

The fourth proportional to 14,351.55, 19,805.03 and 7,978.13 is: 11,009.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,351.55 : 19,805.03 = 7,978.13 : x
  2. Step 2: Convert to fraction form
    14,351.55/19,805.03 = 7,978.13/x
  3. Step 3: Cross multiply
    14,351.55x = 19,805.03 × 7,978.13
  4. Step 4: Simplify right side
    14,351.55x = 158,006,965.08
  5. Step 5: Solve for x
    x = 158,006,965.08/14,351.55
  6. Step 6: Final answer
    x = 11,009.75

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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.