Home / 15,377.18-21,220.54-8,662.79

Finding the Fourth Proportional to 15,377.18, 21,220.54 and 8,662.79

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Solution

The fourth proportional to 15,377.18, 21,220.54 and 8,662.79 is: 11,954.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,377.18 : 21,220.54 = 8,662.79 : x
  2. Step 2: Convert to fraction form
    15,377.18/21,220.54 = 8,662.79/x
  3. Step 3: Cross multiply
    15,377.18x = 21,220.54 × 8,662.79
  4. Step 4: Simplify right side
    15,377.18x = 183,829,113.10
  5. Step 5: Solve for x
    x = 183,829,113.10/15,377.18
  6. Step 6: Final answer
    x = 11,954.67

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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.