Home / 15,660.91-21,612.04-8,587.45

Finding the Fourth Proportional to 15,660.91, 21,612.04 and 8,587.45

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Solution

The fourth proportional to 15,660.91, 21,612.04 and 8,587.45 is: 11,850.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,660.91 : 21,612.04 = 8,587.45 : x
  2. Step 2: Convert to fraction form
    15,660.91/21,612.04 = 8,587.45/x
  3. Step 3: Cross multiply
    15,660.91x = 21,612.04 × 8,587.45
  4. Step 4: Simplify right side
    15,660.91x = 185,592,312.90
  5. Step 5: Solve for x
    x = 185,592,312.90/15,660.91
  6. Step 6: Final answer
    x = 11,850.67

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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.