Home / 15,788.72-21,792.36-8,984.72

Finding the Fourth Proportional to 15,788.72, 21,792.36 and 8,984.72

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Solution

The fourth proportional to 15,788.72, 21,792.36 and 8,984.72 is: 12,401.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,788.72 : 21,792.36 = 8,984.72 : x
  2. Step 2: Convert to fraction form
    15,788.72/21,792.36 = 8,984.72/x
  3. Step 3: Cross multiply
    15,788.72x = 21,792.36 × 8,984.72
  4. Step 4: Simplify right side
    15,788.72x = 195,798,252.74
  5. Step 5: Solve for x
    x = 195,798,252.74/15,788.72
  6. Step 6: Final answer
    x = 12,401.15

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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.