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Finding the Fourth Proportional to 18,355, 25,329.93 and 9,971.50

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Solution

The fourth proportional to 18,355, 25,329.93 and 9,971.50 is: 13,760.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,355 : 25,329.93 = 9,971.50 : x
  2. Step 2: Convert to fraction form
    18,355/25,329.93 = 9,971.50/x
  3. Step 3: Cross multiply
    18,355x = 25,329.93 × 9,971.50
  4. Step 4: Simplify right side
    18,355x = 252,577,397.00
  5. Step 5: Solve for x
    x = 252,577,397.00/18,355
  6. Step 6: Final answer
    x = 13,760.69

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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.