Home / 21,507.85-32,270.88-10,422.79

Finding the Fourth Proportional to 21,507.85, 32,270.88 and 10,422.79

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Solution

The fourth proportional to 21,507.85, 32,270.88 and 10,422.79 is: 15,638.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,507.85 : 32,270.88 = 10,422.79 : x
  2. Step 2: Convert to fraction form
    21,507.85/32,270.88 = 10,422.79/x
  3. Step 3: Cross multiply
    21,507.85x = 32,270.88 × 10,422.79
  4. Step 4: Simplify right side
    21,507.85x = 336,352,605.36
  5. Step 5: Solve for x
    x = 336,352,605.36/21,507.85
  6. Step 6: Final answer
    x = 15,638.60

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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.