Home / 21,069.21-31,609.34-9,975.66

Finding the Fourth Proportional to 21,069.21, 31,609.34 and 9,975.66

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Solution

The fourth proportional to 21,069.21, 31,609.34 and 9,975.66 is: 14,966.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,069.21 : 31,609.34 = 9,975.66 : x
  2. Step 2: Convert to fraction form
    21,069.21/31,609.34 = 9,975.66/x
  3. Step 3: Cross multiply
    21,069.21x = 31,609.34 × 9,975.66
  4. Step 4: Simplify right side
    21,069.21x = 315,323,897.66
  5. Step 5: Solve for x
    x = 315,323,897.66/21,069.21
  6. Step 6: Final answer
    x = 14,966.10

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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.