Home / 21,986.64-30,317.90-21,525.35

Finding the Fourth Proportional to 21,986.64, 30,317.90 and 21,525.35

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Solution

The fourth proportional to 21,986.64, 30,317.90 and 21,525.35 is: 29,681.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,986.64 : 30,317.90 = 21,525.35 : x
  2. Step 2: Convert to fraction form
    21,986.64/30,317.90 = 21,525.35/x
  3. Step 3: Cross multiply
    21,986.64x = 30,317.90 × 21,525.35
  4. Step 4: Simplify right side
    21,986.64x = 652,603,149.55
  5. Step 5: Solve for x
    x = 652,603,149.55/21,986.64
  6. Step 6: Final answer
    x = 29,681.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.