Home / 15,061.50-20,783.38-8,688.67

Finding the Fourth Proportional to 15,061.50, 20,783.38 and 8,688.67

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Solution

The fourth proportional to 15,061.50, 20,783.38 and 8,688.67 is: 11,989.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,061.50 : 20,783.38 = 8,688.67 : x
  2. Step 2: Convert to fraction form
    15,061.50/20,783.38 = 8,688.67/x
  3. Step 3: Cross multiply
    15,061.50x = 20,783.38 × 8,688.67
  4. Step 4: Simplify right side
    15,061.50x = 180,579,930.30
  5. Step 5: Solve for x
    x = 180,579,930.30/15,061.50
  6. Step 6: Final answer
    x = 11,989.51

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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.