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Finding the Fourth Proportional to 18,210.75, 25,130.76 and 10,144.50

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Solution

The fourth proportional to 18,210.75, 25,130.76 and 10,144.50 is: 13,999.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,210.75 : 25,130.76 = 10,144.50 : x
  2. Step 2: Convert to fraction form
    18,210.75/25,130.76 = 10,144.50/x
  3. Step 3: Cross multiply
    18,210.75x = 25,130.76 × 10,144.50
  4. Step 4: Simplify right side
    18,210.75x = 254,938,994.82
  5. Step 5: Solve for x
    x = 254,938,994.82/18,210.75
  6. Step 6: Final answer
    x = 13,999.37

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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.