Home / 21,587.90-29,791.18-12,028.20

Finding the Fourth Proportional to 21,587.90, 29,791.18 and 12,028.20

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Solution

The fourth proportional to 21,587.90, 29,791.18 and 12,028.20 is: 16,598.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,587.90 : 29,791.18 = 12,028.20 : x
  2. Step 2: Convert to fraction form
    21,587.90/29,791.18 = 12,028.20/x
  3. Step 3: Cross multiply
    21,587.90x = 29,791.18 × 12,028.20
  4. Step 4: Simplify right side
    21,587.90x = 358,334,271.28
  5. Step 5: Solve for x
    x = 358,334,271.28/21,587.90
  6. Step 6: Final answer
    x = 16,598.85

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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.