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Finding the Fourth Proportional to 18,999.18, 26,220.54 and 12,614.50

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Solution

The fourth proportional to 18,999.18, 26,220.54 and 12,614.50 is: 17,409.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.18 : 26,220.54 = 12,614.50 : x
  2. Step 2: Convert to fraction form
    18,999.18/26,220.54 = 12,614.50/x
  3. Step 3: Cross multiply
    18,999.18x = 26,220.54 × 12,614.50
  4. Step 4: Simplify right side
    18,999.18x = 330,759,001.83
  5. Step 5: Solve for x
    x = 330,759,001.83/18,999.18
  6. Step 6: Final answer
    x = 17,409.12

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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.