Home / 21,754.80-32,567.40-12,985.20

Finding the Fourth Proportional to 21,754.80, 32,567.40 and 12,985.20

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Solution

The fourth proportional to 21,754.80, 32,567.40 and 12,985.20 is: 19,439.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,754.80 : 32,567.40 = 12,985.20 : x
  2. Step 2: Convert to fraction form
    21,754.80/32,567.40 = 12,985.20/x
  3. Step 3: Cross multiply
    21,754.80x = 32,567.40 × 12,985.20
  4. Step 4: Simplify right side
    21,754.80x = 422,894,202.48
  5. Step 5: Solve for x
    x = 422,894,202.48/21,754.80
  6. Step 6: Final answer
    x = 19,439.12

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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.