Home / 21,159.37-31,760.40-9,318.41

Finding the Fourth Proportional to 21,159.37, 31,760.40 and 9,318.41

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Solution

The fourth proportional to 21,159.37, 31,760.40 and 9,318.41 is: 13,987.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,159.37 : 31,760.40 = 9,318.41 : x
  2. Step 2: Convert to fraction form
    21,159.37/31,760.40 = 9,318.41/x
  3. Step 3: Cross multiply
    21,159.37x = 31,760.40 × 9,318.41
  4. Step 4: Simplify right side
    21,159.37x = 295,956,428.96
  5. Step 5: Solve for x
    x = 295,956,428.96/21,159.37
  6. Step 6: Final answer
    x = 13,987.02

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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.