Home / 15,851.40-21,874.56-8,778.12

Finding the Fourth Proportional to 15,851.40, 21,874.56 and 8,778.12

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Solution

The fourth proportional to 15,851.40, 21,874.56 and 8,778.12 is: 12,113.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,851.40 : 21,874.56 = 8,778.12 : x
  2. Step 2: Convert to fraction form
    15,851.40/21,874.56 = 8,778.12/x
  3. Step 3: Cross multiply
    15,851.40x = 21,874.56 × 8,778.12
  4. Step 4: Simplify right side
    15,851.40x = 192,017,512.63
  5. Step 5: Solve for x
    x = 192,017,512.63/15,851.40
  6. Step 6: Final answer
    x = 12,113.60

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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.