Home / 21,975.90-32,988.15-13,665.30

Finding the Fourth Proportional to 21,975.90, 32,988.15 and 13,665.30

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Solution

The fourth proportional to 21,975.90, 32,988.15 and 13,665.30 is: 20,513.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,975.90 : 32,988.15 = 13,665.30 : x
  2. Step 2: Convert to fraction form
    21,975.90/32,988.15 = 13,665.30/x
  3. Step 3: Cross multiply
    21,975.90x = 32,988.15 × 13,665.30
  4. Step 4: Simplify right side
    21,975.90x = 450,792,966.20
  5. Step 5: Solve for x
    x = 450,792,966.20/21,975.90
  6. Step 6: Final answer
    x = 20,513.06

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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.