Home / 21,015.61-31,515.21-9,173.00

Finding the Fourth Proportional to 21,015.61, 31,515.21 and 9,173.00

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Solution

The fourth proportional to 21,015.61, 31,515.21 and 9,173.00 is: 13,755.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.61 : 31,515.21 = 9,173.00 : x
  2. Step 2: Convert to fraction form
    21,015.61/31,515.21 = 9,173.00/x
  3. Step 3: Cross multiply
    21,015.61x = 31,515.21 × 9,173.00
  4. Step 4: Simplify right side
    21,015.61x = 289,089,100.12
  5. Step 5: Solve for x
    x = 289,089,100.12/21,015.61
  6. Step 6: Final answer
    x = 13,755.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.